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Old 09-08-2012, 09:04 AM   #1
SVT04MN
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Exhaust.

Looking at the exhaust options for my SVT to upgrade over the next couple months.

Starting with a tune. Tom is the dude to talk to. Check.

In terms of exhaust...from the headers back, it sounds like either deleting the cat, or getting a high-flow unit is the first modification to make. MN doesn't have emissions testing, so I'm inclined toward the off-road pipe. Does changing the header or the flex pipe yield any significant gains?

Also looking at cat-back systems. Borla seems to be the popular upgrade, any reason NOT to go for the FSWerks? I'm not looking for something terribly loud, but better sounding than the stock unit would be great.


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Old 09-08-2012, 09:28 AM   #2
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I'd use the stock header, from what I've read & heard it flows pretty good. You could clean it up thou= pull the heat sheild mounts & cermanic coat it. Add the ORP & add a Fwerk's or Borla like you mentioned. For sure go w/ a 2.5'' system.
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Old 09-08-2012, 09:47 AM   #3
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Fswerks Race will be too loud and raspy with a ORP. If you go with Fswerks, go with the stealth. I have the race and stealth and race is loud. Borla is a good sound as well.
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Old 09-08-2012, 11:27 AM   #4
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Yeah, I was thinking the FSWerks Stealth. If it's not enough, the race pipe is only $80. Not sure why the Borla is so much more expensive...

Ceramic coat the header?
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Old 09-08-2012, 11:33 AM   #5
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You won't want the race pipe unless you want a ticket everytime you drive the car. Get the stealth if you are going with Fswerks. Trust me.....I thought I'd ignore all the posts of people saying it was too much and get the race anyways. Where I live I can get away with it barely. But I drive mostly freeway and rarely have to go into a populated area. I have the stealth on it now. I want to coat my header....but I was in a hurry so I just removed the standoffs and smoothed out the header and wrapped it.

Coating the header will help with scavenging and keep the heat inside the pipe and keep underhood temps down. Wrapping will help with this also. The ORP will give you a slight gain.

IIRC Tom recommends a tune, TB, and a ORP as your best bets for a N/A engine. Otherwise your money is better spent toward FI (Supercharger or better yet a Turbo setup) if your looking for performance in that aspect.
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Old 09-08-2012, 11:47 AM   #6
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I'm not going to boost this car, anytime soon anyway...I think I'm going to do the exhaust before the TB.
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Old 09-08-2012, 04:53 PM   #7
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A drop in panel filter such as K&N, ITG, etc helps too.
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Old 09-08-2012, 05:19 PM   #8
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I'll 3rd the FSW stealth.
If for nothing else it reduces the drone to an acceptable level.


and FWIW, if you just use header wrap, the surface temp of the header drops to about 400*F,,, if you add the factory heat shield to the header wrap surface temp drops to ~120*F ... I never checked with bare header (no reason to) or with just the factory heat shield (forgot to check). But proof in the pudding, wrap + heat shield is awesome for eliminating underhood temps.
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Old 09-08-2012, 05:50 PM   #9
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I've heard that wrap can lead to premature rust outs? True? I'm in MN, so moisture would definitely be a problem if that's the case...
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Old 09-08-2012, 05:54 PM   #10
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Quote:
Originally Posted by SVT04MN View Post
I've heard that wrap can lead to premature rust outs? True? I'm in MN, so moisture would definitely be a problem if that's the case...
It's a stainless steel header.
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