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Old 06-24-2014, 07:15 PM   #1
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Boss intake install

I am thinking of getting the Boss intake for my 2014 GT, and was wondering how hard the install is? and how good are the power gains?
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Old 06-24-2014, 07:34 PM   #2
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Lots of info all of the internet on this. However ME has a sticky on this modification. It's the first in 2011-2014 Mustang GT threads or here Install of the Boss 302 intake manifold!
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Old 06-24-2014, 11:33 PM   #3
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Boss intake install

Theres no real way to tell you how hard an install is. For my mom its impossible to even change out a license plate. For someone like rapinator engine swapping with complete internal rehaul is easy as sliced cheese.

If after reading the install instruction you have some questions then we can help.

Check out this thread... Hopefully it can help u figure things out.

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Old 06-25-2014, 12:20 AM   #4
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Awsome thanks guys.


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Old 06-25-2014, 01:12 AM   #5
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Boss intake makes power way up top, if your on a stock motor how high are you willing to raise the rev limiter to get the power?


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Old 06-25-2014, 01:45 AM   #6
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Boss intake install

My advice from my own experience is that with the Boss IM you should consider the two points:

1.) Have 3.73 or 4.10 gears. 3.31 are too tall to efficiently keep you in the beefy part of the powerband. This especially in conjunction with 20" rims.

2.) Consider keeping the stock cats. It might give you more torque. Typically less restrictive exhaust gives you more HP but you "may" see a loss in torque. So with intake and full catless exhaust you might see 420whp but with cats you might have only 405-410whp but have a slightly higher torque curve.

I tried to google real world dyno numbers to compare cat delete pipes but haven't found comparisons showing just the cat pipes alone before and after.
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Old 06-25-2014, 09:20 AM   #7
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My advice from my own experience is that with the Boss IM you should consider the two points:

1.) Have 3.73 or 4.10 gears. 3.31 are too tall to efficiently keep you in the beefy part of the powerband. This especially in conjunction with 20" rims.

2.) Consider keeping the stock cats. It might give you more torque. Typically less restrictive exhaust gives you more HP but you "may" see a loss in torque. So with intake and full catless exhaust you might see 420whp but with cats you might have only 405-410whp but have a slightly higher torque curve.


I tried to google real world dyno numbers to compare cat delete pipes but haven't found comparisons showing just the cat pipes alone before and after.
I dont think thats exactly true. Without writing a paragrpah, basically velocity is what creates torque, be it intake air or exhaust air. Typically when people moved from the smaller factory exhausts to larger free flowing ones they would pick up HP and lose TQ. This was due to the fact that the exhaust lost velocity through the larger diameter pipe, and where the "back pressure makes torque," rumor came from. It is possible however, to have a large, free flowing exhaust that still makes torque. Basically any true "tuned length headers," can be free flowing and still create torque, but again, i'll avoid typing a book on the subject.

My main point however, is with the advancements in the coyote's cam technology you basically can delete the cats, tune the cams, and gain HP as well as torque. Also, the engine is going to have to work VERY hard to pump exhaust gasses out through the factory cats at the kind of rpms the Boss manifold wants to see, and will somewhat nullify the gains.
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Old 06-25-2014, 12:22 PM   #8
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I dont think thats exactly true. Without writing a paragrpah, basically velocity is what creates torque, be it intake air or exhaust air. Typically when people moved from the smaller factory exhausts to larger free flowing ones they would pick up HP and lose TQ. This was due to the fact that the exhaust lost velocity through the larger diameter pipe, and where the "back pressure makes torque," rumor came from. It is possible however, to have a large, free flowing exhaust that still makes torque. Basically any true "tuned length headers," can be free flowing and still create torque, but again, i'll avoid typing a book on the subject.

My main point however, is with the advancements in the coyote's cam technology you basically can delete the cats, tune the cams, and gain HP as well as torque. Also, the engine is going to have to work VERY hard to pump exhaust gasses out through the factory cats at the kind of rpms the Boss manifold wants to see, and will somewhat nullify the gains.
Yeah without getting into a debate I've seen different cars with cats and without cats and although the HP numbers are usually within 10hp or so of one another the torque has varied more widely.

I coulda swore I saw a Boss manifold and catless GT with 93 tune pull something like 421whp and 401 torque in one dyno test and then I saw another dyno test on a different car where the HP was like 418whp and 380 torque.

I'm not qualified to make too much assumptions here regarding gain/loss of torque due to less restrictive gas flows but based on the general rule I just assumed it would hold true here.

Maybe I'm just getting sick of my loud *** catless exhaust lol
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Old 06-25-2014, 02:22 PM   #9
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I'd almost chalk that up to being dyno variation. With my car, on the exact same mods / tune i made 413 whp / 411 wtq on one dyno, and 441 whp / 352 wtq on another. Needless to say, i dont think the first was loaded right, no all motor car should make hp and torque that close to eachother.
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Old 06-25-2014, 03:20 PM   #10
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OP you will void your warranty. I just got a boss mani and a 90mm ford TB for my setup. Long term plans are to go FI. That is why I am buying these parts slowly as I see good deals out there. Good luck with your build.
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Old 06-25-2014, 04:04 PM   #11
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The install is cake. If you can put together a entertainment center you can install the Boss mani. My only tip would be to flip the fuel rail to the side instead of removing it all the way and don't waste your money on the install kit. For $4.99 in parts (hose clamps & 2' of emission hose) vs $200 install kit you can have the same end result.
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Old 06-25-2014, 04:06 PM   #12
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Latemodelrestoration sells all parts needed for $12 shipped.
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Old 06-25-2014, 04:08 PM   #13
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Latemodelrestoration sells all parts needed for $12 shipped.
$4.99 at Autozone will save ya a couple bucks.
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Old 06-25-2014, 04:17 PM   #14
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Get it. It's a good mod if you use it to its advantage. All depends on how your car is tuned also.



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Old 06-25-2014, 04:23 PM   #15
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Install is a walk in the park.

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Old 06-25-2014, 04:27 PM   #16
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But honestly if your looking for power, go with the cobra jet. If it was out at the time I bought the boss I would have went with the cobra jet.

Needless to say I will have a boss mani up for sale soon.

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Old 06-25-2014, 09:34 PM   #17
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What kind of exhaust should I get with this manifold?


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Old 06-25-2014, 09:41 PM   #18
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What kind of exhaust should I get with this manifold?


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Whatever you choose. Whatever it is go with no cats. But Kind of a bland question. Your just going to get opinions.

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Old 06-25-2014, 09:47 PM   #19
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Is this going to make my car louder?


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Old 06-25-2014, 10:03 PM   #20
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Whatever you choose. Whatever it is go with no cats. But Kind of a bland question. Your just going to get opinions.

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Old 06-25-2014, 10:09 PM   #21
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This thread is so important, it should be a sticky. So much great information to be had. You guys are awesome, I appreciate you.
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Old 06-25-2014, 10:13 PM   #22
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$4.99 at Autozone will save ya a couple bucks.
Not when you consider gas/tire wear
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Old 06-26-2014, 05:52 AM   #23
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This thread is so important, it should be a sticky. So much great information to be had. You guys are awesome, I appreciate you.
There already is one, and at the top of this forum page!

Install of the Boss 302 intake manifold!
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Old 06-26-2014, 08:55 AM   #24
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Does the car need tuning afterwards?

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Old 06-26-2014, 09:48 AM   #25
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The car will need a tune to raise the rev limiter to 8800. DO NOT shift before that or you'll be wasting your time.
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Old 06-26-2014, 10:01 AM   #26
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* also to actually hit 8000 in your tune it's going to have to be someone who actually knows what they are doing. There is all sorts of built in limiters in the stock tune, that have to be taken out. Not everyone knows how to do this.

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Old 06-26-2014, 10:47 AM   #27
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Post #25 had some sarcasm in it as well.................
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Old 06-26-2014, 10:48 AM   #28
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Post #25 had some sarcasm in it as well.................
I noticed that.

On the 8800 note I wish

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Old 06-26-2014, 10:55 AM   #29
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The car will need a tune to raise the rev limiter to 8800. DO NOT shift before that or you'll be wasting your time.
I think I'll just put the limiter at 9000 then. That way I can shift early and not worry about the limiter kicking in. So annoying.

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