Boss 302 Intake Manifold Install How To

Posted by on February 25, 2011 - more

The 2012 Boss 302 Intake Manifold has been THE talk of the town since it was first spotted in the photos released by FoMoCo. Then we got another dose of it in the FRPP catalog wearing part # M-9424-M50BR. Then came all of the controversy on the interwebs all over the forums over availability. Well, all BS aside, we have them in the warehouse & we put one on a car. Scott’s Race Red Brembo Package 2011 5.0L Mustang GT to be exact. Surprisingly, despite how it looks initially, it really went quite smoothly & quickly. Scott & I were recapping after the install & we both agreed that putting this intake on a 5.0L Coyote was vastly simpler than installing an intake on a venerable pushrod 5-oh. Enough of the appetizer, lets get to the meat & potatoes!

Oh, on a side note, you’ll be getting several first looks at the all new Nitrous Outlet Plate Kit Nitrous System designed specifically for 2011-2012 5.0L Mustang. And yes, it does fit with the Boss Intake just fine. A full install write up will be coming up soon on this Nitrous System.

First, remove your intake cover. This is done by simply pulling up on the cover & unsnapping it.

Second, remove your inlet tube. This Mustang was already equipped with a Steeda CAI, so we simply loosened a couple of clamps, disconnected the sound tube & PCV tube, & pulled it free of the car. Just to get the PCV tube out of the way, we removed it from the valve cover as well.

Boss 302 Intake Manifold

We then removed the breather tube that runs from the RH valve cover to the intake manifold.

Boss 302 Intake Manifold

After that, we pulled the throttle body loose & let it hang out of the way. You can fully remove it from the car, but because of the nitrous system on this one, we just let it hang out because it looked comfortable.

Boss 302 Intake Manifold

Next, we pulled the purge valve off of the intake. This is the part that requires all the Boss specific stuff to properly locate. Well, at least that is what was being said. No says I. We’ll cover the cheap fix here in a bit.

Boss 302 Intake Manifold

Boss 302 Intake Manifold

On each side of the intake you’ll see 2 nuts holding down plastic brackets, & on the drivers side, the brake booster vacuum tube. Remove those & set the brackets to the side & pull the vacuum tube free.

Boss 302 Intake Manifold

Boss 302 Intake Manifold

Once those are out of the way, grab 2 sets of pliers & a friend to remove the booster vacuum hose from the intake manifold. The 2 clamps are connected with a metal strap, so they don’t move independently.

Boss 302 Intake Manifold

Then you can remove the foam sound deadener from both sides of the fuel rails.

Boss 302 Intake Manifold

Now, remove the 4 fuel rail retaining bolts & set them to the side. Unplug all the fuel injector electrical connectors. Using a 3/8″ fuel & a/c line disconnect tool, disconnect the fuel feed line. Wrap the fitting with a rag to prevent gas from going everywhere. (its still a safe bet to have your safety goggles on) Remove the fuel rails from the car by gently pulling up & releasing the injectors from the intake, & set them to the side.

Boss 302 Intake Manifold

Boss 302 Intake Manifold

Boss 302 Intake Manifold

You are now left with 6 bolts holding the intake to the heads, 3 on each side. They are located front corner, dead center, & rear corner. Fully loosen all 6 of these. They will not come out of the intake, so don’t spend too much time trying. Once you’re done with that, lift up on the manifold & slide it forward slightly. On the very back there are 4 wiring harness retainers that need to be pulled free from the intake.

Boss 302 Intake Manifold

Pull that stock intake out of the way to make room for better looks & more power!

Boss 302 Intake Manifold

Here is a better look at the 4 wiring harness retainers. Also, that is oil on Scott’s finger & there was more in the intake. Probably a good excuse to add an oil separator.

Boss 302 Intake Manifold

Compared side by side, you’d pick the Boss 302 Intake all day long based on looks alone! You can also see the locations of the retaining bolts in these pics. Admittedly, we got in a hurry & forgot to check the inlet opening sizes, but we’ll get that info for you soon.

Boss 302 Intake Manifold

Boss 302 Intake Manifold

Okay, stop staring at the intake & get ready to put it on. Set the fuel rails in to place on the Boss intake & engage the injectors in to their respective ports. As you can see, the stock fuel rails clear just fine. This also illustrates the vast difference in the intakes, as the front crossover tube used to be above the throttle body!

Boss 302 Intake Manifold

The new intake comes with gaskets already installed, so all you have to do is set the Boss Intake on the heads & finger tighten the 6 retaining bolts. At the back of the intake, only the outer 2 of the 4 wiring harness retainers have a spot to attach, go ahead & affix them to the intake.

Boss 302 Intake Manifold

Slide in the 4 fuel rail retaining bolts & finger tighten those as well. Torque the 6 Intake bolts to 89in-lb using the following sequence.

Boss 302 Intake Manifold

Torque the 4 fuel rail retaining bolts to 89in-lb using the following sequence.

Boss 302 Intake Manifold

Plug in all the injector electrical connectors, connect the fuel supply line, & reinstall the foam sound deadeners. Set the booster vacuum tube in to place & reinstall both plastic heater hose brackets.

Boss 302 Intake Manifold

Re-attach the throttle body. Doesn’t that Nitrous Plate just look baller? Nitro Dave & the crew & Nitrous Outlet take their nitrous seriously.

Boss 302 Intake Manifold

In its stock orientation, the brake booster hose won’t want to cooperate when trying to attach it to the Boss Intake.

Boss 302 Intake Manifold

Twist it around like so & it will go on kink free. Remember to have you 2 pair of pliers & a friend ready for this step.

Boss 302 Intake Manifold

Re-attach the breather tube. See that loose connector hanging there in the breeze? That is for your purge valve, which we’ll cover next.

Boss 302 Intake Manifold

The purge valve. Its purpose is to vent fuel tank vapor in to the intake manifold during certain operating conditions. All we’ve seen on the ‘net so far is that one company left it dangling. Well, that is an option. You car does not need it to run. However, in my experience, this will cause the check engine light to illuminate. On the stock intake, the purge valve attached directly to the intake behind the throttle body. On the 2012 Boss 302, the purge valve is located on the driver side rear of the intake & it is plumbed a little differently. You can get the correct Boss hoses, purge valve & bracket for just under $200 when they are available, but they are not currently available. Plus, you’ll still have to lengthen your wiring harness to reach the new purge valve on the other side of the motor. While this is the most correct way to complete the install, it didn’t help us at all right now. So good old southern ingenuity kicked in & we determined that if we made a run to the parts store to acquire an M8x1.25 bolt with some washers, 2 feet of fuel/emissions hose, & some hose clamps, we’d be in business & functioning as intended. So here is our fix. Is it ideal, no, but there is nothing wrong with it either. It gets the job done for now until something new comes about.

Squeeze on the 3/8″ fuel/emisson hose. It is a tight fit, but apply a little lube & it will go on. Put on a clamp & tighten it down.

Boss 302 Intake Manifold

Remove the rubber insulators as they won’t be needed. Using a bolt, a flat washer, & a lock washer (the lock washer goes between the head of the bolt & the flat washer) attach the purge valve to the engine block. It was kind of hard to get a good pic of this, but hopefully you get the gist. Plug the electrical connector back in & re-connect the purge line.

Boss 302 Intake Manifold

Run the fuel/emission hose under the neck of the intake & connect it to the remaining open port on the driver side of the intake, clamping the connection.

Boss 302 Intake Manifold

It has been widely reported that the Steeda cold air intake will not fit with the Boss 302 manifold, but I’m happy to report that it darn sure will. Now don’t get me wrong, it’s not a slide it on & done type of deal, but you can make it fit. We didn’t even cut anything. Yes, there is a .75″ nitrous plate installed on this car, but I can’t help but think that only made the fitment a bit more difficult, if anything. Take your time & have an extra set of hands around to help tighten clamps or hold the intake in place. Supposedly the JLT CAI fits a little better, we’ll be finding out for sure soon.

Boss 302 Intake Manifold

Boss 302 Intake Manifold

Oh, & don’t even bother trying to re-use your stock strut tower brace. We’ll be trying several different varieties & listing which ones fit in the description of the Boss Manifold.

Boss 302 Intake Manifold

Because of the difference in airflow this intake provides, a custom tune will be necessary. We do have the required tune available as we speak, so no worries there! Load you new custom tune in your Mustang & start it up. It will sound a little angry at first as she re-learns everything, but it’ll smooth right out & you’ll be on the road enjoying your newfound power! Speaking of power, we we’re unable to get to the dyno, but we’ll be posting #s as soon as we have the ability to do so.

Late Model Restoration offers the intake by itself:
2011-2012 Mustang 5.0L Ford Racing Boss 302 Intake Manifold, M-9424-M50BR

or with the required custom tune:
2011-12 Mustang 5.0L Ford Racing Boss 302 Intake Manifold M-9424-M50BR With BBR Custom Tune

Don’t forget to paint your coil covers, or replace them with the Blue FRPP Coil Covers to complete the Boss 302 appearance!


Image Source Courtesy of


  1. Nathan Birkes says:

    Where it says “Late Model Restoration offers the intake by itself:” you linked to the wrong address. Just an FYI. Nathan @ LRS. :)

  2. tickle says:

    What’s up, its nice piece of writing regarding media print,
    we all know media is a fantastic source of facts.

  3. Hi there! This is my first visit to your blog!

    We are a team of volunteers and starting a new project in a community in the same niche.
    Your blog provided us useful information to work on. You have done a extraordinary job!

  4. w-two agency says:

    Unquestionably believe that which you stated. Your favorite justification appeared to be on the net
    the simplest thing to be aware of. I say to you, I definitely get irked while
    people consider worries that they just don’t know about.
    You managed to hit the nail upon the top and defined out the whole thing without having side-effects , people
    could take a signal. Will likely be back to get more.

  5. What i do not realize is in fact how you’re not actually a lot more well-appreciated than you
    might be right now. You are so intelligent. You already know thus significantly on the subject of this matter, made me for my
    part believe it from numerous various angles. Its like
    women and men don’t seem to be interested unless it is
    something to do with Girl gaga! Your own stuffs excellent.

    Always maintain it up!

  6. Appreciate the recommendation. Let me try it out.

  7. Nice post. I was checking continuously this weblog and I am inspired!
    Extremely useful information specially the final section :) I care for
    such info a lot. I used to be looking for
    this certain info for a very long time. Thanks and best of luck.

  8. Nice post. I was checking constantly this blog and I am impressed!

    Very useful information particularly the last part :) I
    care for such information a lot. I was seeking this certain information for a very
    long time. Thank you and good luck.

  9. Leanna says:

    Just want to say your article is as amazing. The clarity on your put up is just great and
    that i could suppose you are an expert on this subject.
    Well together with your permission let me to grasp
    your feed to keep updated with forthcoming post.
    Thank you one million and please continue the rewarding work.

  10. Thank you for any other magnificent article. The place else may just anybody get that kind of
    info in such an ideal way of writing? I’ve a
    presentation next week, and I’m at the look for such info.

  11. credit card says:

    Yes! Finally someone writes about sales life easier.

  12. Thanks very interesting blog!

  13. I’ll right away seize your rss feed as I can not in finding your email subscription hyperlink or newsletter service.
    Do you’ve any? Kindly let me recognise so that I could subscribe.

  14. Lieselotte says:

    Fascinating blog! Is your theme custom made or did you download it from
    somewhere? A theme like yours with a few simple adjustements would really make my
    blog stand out. Please let me know where you got your design. Bless you

  15. Lovie says:

    I blog quite often and I really appreciate your information. This great
    article has really peaked my interest. I will take a note of your site and keep
    checking for new information about once per week.
    I subscribed to your RSS feed as well.

  16. Joshua says:

    Hi there to every one, for the reason that I
    am actually keen of reading this web site’s post to be updated regularly.

    It consists of fastidious stuff.

  17. Hey! This is my 1st comment here so I just wanted to give a quick shout out and say I really enjoy
    reading through your blog posts. Can you recommend
    any other blogs/websites/forums that go over the same topics?

    Thank you so much!

  18. Vance says:

    I’m curious to find out what blog platform you are utilizing?
    I’m experiencing some minor security problems with my latest
    site and I would like to find something more safe.

    Do you have any solutions?

  19. I’ll immediately grab your rss as I can’t find your e-mail subscription link or e-newsletter
    service. Do you’ve any? Please allow me realize so that I may just
    subscribe. Thanks.

  20. Usually I do not learn post on blogs, however
    I would like to say that this write-up very pressured me to
    take a look at and do it! Your writing style has been amazed me.
    Thanks, quite nice article.

  21. Jame says:

    I want to to thank you for this excellent read!! I absolutely enjoyed every little bit of it.

    I have you book-marked to look at new stuff you

  22. Appreciate this post. Let me try it out.

  23. Melvin says:

    Hi it’s me, I am also visiting this site regularly, this web site is actually good
    and the people are genuinely sharing pleasant thoughts.

  24. Shenna says:

    Hi to every one, as I am actually eager of reading this
    web site’s post to be updated on a regular basis. It contains pleasant material.

  25. I am curious to find out what blog system you have been working
    with? I’m having some minor security problems with my latest site and I’d like to find something more safeguarded.

    Do you have any recommendations?

  26. Tresa says:

    Hi there, I would like to subscribe for this web site to obtain hottest updates, so
    where can i do it please help.

  27. Dann says:

    Excellent article. Keep writing such kind of info on your site.
    Im really impressed by it.
    Hi there, You’ve done an excellent job. I will certainly digg it
    and in my opinion recommend to my friends. I am confident they’ll be benefited from this

  28. Hi there, I desire to subscribe for this web site to take newest updates, so where can i do it please help out.

  29. Bridget says:

    Hey there! I could have sworn I’ve been to this website before but after reading
    through some of the post I realized it’s new to me. Nonetheless, I’m definitely delighted I found
    it and I’ll be bookmarking and checking back

  30. Hortense says:

    Wonderful site you have here but I was wondering if you knew of
    any forums that cover the same topics discussed here?
    I’d really love to be a part of community where I can get advice
    from other knowledgeable individuals that share the same interest.

    If you have any suggestions, please let me know. Cheers!

  31. What a data of un-ambiguity and preserveness of valuable experience regarding unexpected feelings.

  32. Greate pieces. Keep posting such kind of info on your site.
    Im really impressed by your blog.
    Hey there, You’ve done an incredible job. I will definitely digg it and
    for my part recommend to my friends. I am confident they’ll be benefited from this website.

  33. I have been surfing on-line greater than three
    hours lately, yet I by no means found any attention-grabbing article
    like yours. It’s beautiful worth sufficient for me. In my opinion, if all website owners and bloggers made good content material as you probably did,
    the internet shall be much more useful than ever before.

  34. Lorene says:

    Remarkable issues here. I’m very happy to look your article.
    Thanks so much and I am looking forward to
    contact you. Will you kindly drop me a mail?

  35. It’s awesome to pay a visit this site and reading the views of all friends on the topic of this post, while I am also keen of getting experience.

  36. Daniel says:

    Pretty section of content. I just stumbled upon your weblog and in accession capital to assert that I acquire
    in fact enjoyed account your blog posts. Anyway I’ll be
    subscribing to your feeds and even I achievement you access
    consistently rapidly.

  37. Excellent blog here! Also your site loads up very fast!
    What host are you using? Can I get your affiliate link to your host?

    I wish my site loaded up as fast as yours lol

  38. It is appropriate time to make some plans for the future and it
    is time to be happy. I’ve read this post and
    if I could I desire to suggest you few interesting things or tips.
    Perhaps you can write next articles referring to this
    article. I desire to read more things about it!

  39. Because the admin of this website is working,
    no hesitation very soon it will be well-known,
    due to its quality contents.

  40. Thanks for your marvelous posting! I truly enjoyed
    reading it, you might be a great author.I will
    make sure to bookmark your blog and will come back someday.

    I want to encourage continue your great writing, have a nice afternoon!

  41. Celia says:

    My spouse and I stumbled over here different page and thought I may as well check things out.

    I like what I see so now i am following you. Look forward to checking
    out your web page for a second time.

  42. Very energetic blog, I enjoyed that bit. Will there be a part 2?

  43. credit card says:

    Great blog! Do you have any suggestions for aspiring writers?
    I’m planning to start my own blog soon but I’m a little lost on everything.

    Would you advise starting with a free platform like WordPress or
    go for a paid option? There are so many options out there that I’m completely confused ..
    Any ideas? Kudos!

  44. Hey there, I think your blog might be having
    browser compatibility issues. When I look at your
    blog site in Chrome, it looks fine but when opening in Internet Explorer, it has some overlapping.

    I just wanted to give you a quick heads up! Other then that, amazing blog!

  45. A motivating discussion is definitely worth comment.
    I do believe that you ought to write more
    on this topic, it might not be a taboo matter but usually people do not discuss such issues.
    To the next! All the best!!

  46. Wow, amazing blog structure! How lengthy have you ever been running a blog for?
    you make blogging glance easy. The whole glance of your site is great,
    as neatly as the content material!

  47. says:

    Pretty section of content. I just stumbled upon your weblog and in accession capital
    to assert that I acquire actually enjoyed account your blog posts.
    Any way I’ll be subscribing to your feeds and even I achievement you access consistently rapidly.

  48. credit card says:

    An intriguing discussion is worth comment. I do think that you should publish more on this subject, it might not be a taboo matter but usually people do
    not talk about these subjects. To the next! Best wishes!!

  49. I know this if off topic but I’m looking into starting my own blog and was wondering what all is
    needed to get setup? I’m assuming having a blog like yours would cost a pretty penny?
    I’m not very internet smart so I’m not 100%
    positive. Any tips or advice would be greatly appreciated.

  50. At this time it seems like Expression Engine is the best blogging platform out there right now.
    (from what I’ve read) Is that what you’re using on your blog?

  51. Magnificent beat ! I wish to apprentice while you amend your website, how can i subscribe for a weblog site?

    The account aided me a appropriate deal.

    I have been tiny bit familiar of this your broadcast offered bright transparent idea

  52. I’m not sure where you’re getting your info, however good topic.
    I needs to spend a while finding out more or figuring out more.
    Thanks for wonderful information I was in search of this information for my mission.

  53. Donnie says:

    Nice blog! Is your theme custom made or did you download
    it from somewhere? A theme like yours with a few simple
    adjustements would really make my blog stand out. Please
    let me know where you got your design. Thank you

  54. Otilia says:

    Howdy! I simply want to offer you a big thumbs up for the excellent info you have right here on this post.
    I will be returning to your blog for more soon.

  55. Sharyl says:

    Wow, this post is pleasant, my younger sister is analyzing these kinds of things, thus I am
    going to tell her.

  56. WOW just what I was searching for. Came here by searching for dar es salaam hotels

  57. Do you mind if I quote a few of your posts as long as
    I provide credit and sources back to your website?

    My website is in the very same niche as yours and my users would genuinely benefit from some of the information you present here.
    Please let me know if this alright with you. Thanks
    a lot!

  58. Hi, I do think this is an excellent site. I stumbledupon it
    ;) I will come back once again since i have bookmarked it.
    Money and freedom is the best way to change, may you be
    rich and continue to help others.

  59. Thanks for the marvelous posting! I definitely enjoyed reading it, you will be a great author.
    I will ensure that I bookmark your blog and may come
    back later on. I want to encourage you to continue your great work,
    have a nice day!

  60. Great site you have got here.. It’s hard to find high-quality writing like yours nowadays.
    I really appreciate people like you! Take care!!

  61. I am regular visitor, how are you everybody? This article posted at this
    web page is actually fastidious.

  62. sales life says:

    I loved as much as you will receive carried out right here.
    The sketch is attractive, your authored material
    stylish. nonetheless, you command get got an shakiness over that you wish be delivering the following.
    unwell unquestionably come more formerly again since exactly the same nearly very often inside case you shield this increase.

  63. I am really impressed with your writing skills as well as with the layout on your blog.
    Is this a paid theme or did you modify it yourself?
    Either way keep up the nice quality writing, it’s rare to see a
    great blog like this one these days.

  64. Hi! Do you know if they make any plugins to safeguard against hackers?
    I’m kinda paranoid about losing everything I’ve worked hard on. Any suggestions?

  65. Every weekend i used to pay a quick visit this website, for the
    reason that i want enjoyment, as this this web site conations genuinely
    good funny stuff too.

  66. Hi there, this weekend is pleasant in support of me, because this moment
    i am reading this enormous educational piece of writing here at my home.

  67. You’re so cool! I do not believe I have read something like that before.

    So nice to discover another person with unique thoughts on this issue.
    Seriously.. thank you for starting this up. This site is something that is required
    on the web, someone with some originality!

  68. Hi this is somewhat of off topic but I was wondering if blogs use WYSIWYG editors or if you have to manually code with HTML.
    I’m starting a blog soon but have no coding knowledge so I wanted to get guidance from someone with experience.
    Any help would be greatly appreciated!

  69. Hey there excellent website! Does running a blog such as this
    require a great deal of work? I’ve virtually no understanding
    of computer programming however I was hoping to start my own blog in the near future.
    Anyways, should you have any recommendations or tips for new blog owners
    please share. I understand this is off subject however I simply needed to ask.
    Thank you!

Leave a Reply

Your email address will not be published. Required fields are marked *