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Old 12-18-2008, 10:11 AM   #1
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Need info about exhaust setup

Ok so i have an 05 GT that right now only has a K&N drop in, and a superchips 91 octane tune. I am about to put an air raid intake (compatible with the tune so no worries there) and a new exhaust system. My question is if i run shorty headers into hi-flow cats, and glasspacks (or other aftermarket mufflers) will i damage my engine due to reduced backpressure? I know i will not be reaping the full HP benefits without a full dyno tune and that is ok with me, I just need to know if i'll be harming the 4.6
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Old 12-18-2008, 10:18 AM   #2
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Re: Need info about exhaust setup

No, you'll be fine. However, shorties really are a waste of money unless you have a cracked stock manifold or something. The high flow cats are a good idea, but the shorties aren't worth it in the end.

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Old 12-18-2008, 03:37 PM   #3
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Re: Need info about exhaust setup

i agree with venom, shortys are a waste of time, go long tube headers, bassani and kooks make a nice dam pair, i say get rid of the cats but not alot of people want to go that route.
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Old 12-18-2008, 05:14 PM   #4
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Re: Need info about exhaust setup

Yeah I'm keeping it catted, no i don't care about the trees IMHO the 3v sounds better with them, as for the LT's I'm not ready to put that amount of money, time, or effort into it, maybe in the next couple years or months depending on how power hungry i get.
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Old 12-18-2008, 05:39 PM   #5
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Re: Need info about exhaust setup

well you don't want to buy shorties and then down the road buy LTs. just keep the stock manifolds and change the cats for now. on the S197 it's no harder to install LTs as it is to install shorties. so that's not an isuee. If cost is the real problem than MAC makes Ceramic coated LT's for around $500. And if you do a header swap get ceramics it's worth it with the heat reduction under the hood you get
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Old 12-18-2008, 06:00 PM   #6
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Re: Need info about exhaust setup

good advice....can you tell me that shorties don't generate much power over stock manifolds so I can get it out of my head lol
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Old 12-18-2008, 06:03 PM   #7
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Re: Need info about exhaust setup

shorties don't do crap over shockers. get it ,got it, good!
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Old 12-18-2008, 06:52 PM   #8
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Re: Need info about exhaust setup

thanks, looks like ill be saving my money then
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Old 12-18-2008, 10:52 PM   #9
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Re: Need info about exhaust setup

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Originally Posted by hottcobra View Post
shorties don't do crap over shockers. get it ,got it, good!
Absolutely...shorties are just stock manifolds made out of pipe instead of cast. They are useless unless you have a busted stocker or are running a turbo setup.
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Old 12-19-2008, 08:37 AM   #10
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Re: Need info about exhaust setup

Now that I have a 2008 Bullitt this all interests me, too. Are installing LTs on an '05-'09 as big a PITA as on my 2002 GT?
Jim
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Old 12-19-2008, 06:35 PM   #11
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Re: Need info about exhaust setup

the factory manifolds will support around 400 hp. If youre not planning on making that much power I would stick with them and save that money for a tune,pullies,and gears.With these few bolt ons you can see 12 sec et's fairly easily.
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Old 12-22-2008, 03:10 PM   #12
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Re: Need info about exhaust setup

i have a tune right now....are pullies worth it??
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Old 12-23-2008, 02:45 PM   #13
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Re: Need info about exhaust setup

Pullies will free up about 5-10 hp. I noticed my car reved a little faster when I put them on. If you plan on S/C your car, I wouldn't put pullies on. As far as brands I recommend Steeda.
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Old 12-23-2008, 10:29 PM   #14
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Re: Need info about exhaust setup

pullies are well worth the money if you are not going forced induction.If you are planning turbo or s/c you will most likely have to put the stock pullies back on anyway so it would be a waste of money at that point.You could always resale them when/if you go forced induction and recoop some funds that way.I run pullies on every car I have,great hp per dollar.
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Old 12-24-2008, 01:34 PM   #15
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Re: Need info about exhaust setup

Quote:
Originally Posted by Benjytps View Post
pullies are well worth the money if you are not going forced induction.If you are planning turbo or s/c you will most likely have to put the stock pullies back on anyway so it would be a waste of money at that point.You could always resale them when/if you go forced induction and recoop some funds that way.I run pullies on every car I have,great hp per dollar.
thats some solid advice!
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Old 12-31-2008, 05:18 PM   #16
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Re: Need info about exhaust setup

why do people keep saying shorties do nothing? yeah long tubes will probably do more but ive replaced my manifold with shorties cause one cracked and it feels strong both low and high. are you gonna tell me a 6 benifits more form headers than an 8?
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Old 12-31-2008, 11:49 PM   #17
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Re: Need info about exhaust setup

Its not that shorties arent good, they just arent worth it to allot of people due to the fact that longtubes are more beneficial once you start making more power.The stock manifolds ,on the newer cars especially,flow pretty good so your improvements are minimal at best with shorty headers.If you are investing in headers,its worth the price difference to go long tubes over shorties.
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Old 01-01-2009, 12:23 AM   #18
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Re: Need info about exhaust setup

The 99-04 V6s have much more of a reason to swap to shorty headers than the newer cars. Mainly, because the 99-04 "manifolds" are absolute crap and are very prone to cracking.

If you're going to do headers and a mid-pipe on a newer GT, you're wasting money if you don't go with long tubes. And no, you won't have any problems with lack of back pressure.
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Old 01-02-2009, 12:00 PM   #19
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Re: Need info about exhaust setup

The V6 scene is amazing to me. Can some of you V6 guys post some of your sound clips. I'm either going to give my 2002 GT to my nephew as his first car, or get him a 94-up V6. Did those cars come with 5-speeds?
Jim
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Old 01-02-2009, 12:02 PM   #20
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Re: Need info about exhaust setup

Quote:
Did those cars come with 5-speeds?
Yea, though I'd stay away from 94-96 V6's unless you can confirm that their head gaskets have been replaced.
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Old 01-02-2009, 12:31 PM   #21
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Re: Need info about exhaust setup

Do they blow regularly. I remember my boss helping his son replace the head gaskets on his 95 V6.

Jim
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Old 01-02-2009, 12:46 PM   #22
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Re: Need info about exhaust setup

Yea. If you don't mind risking it and can replace it yourself then it might not be a big deal to you. Just a warning.
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