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Discussion Starter #1
I am from Effingham, IL. Would prefer a shop in St Louis or Indy. Only mod thus far is a drop-in K&N.
I dont want an increase in dB. I may stick with the stock exhaust. Would a Corsa or magnaflow exhaust yield any HP or interior dB gains? Does the LS2 prefer 1 3/4 primaries or smaller. The beauty of the LS2 is its low end TQ, will this suffer with 1 3/4 tubes. I have stainless works on my C5 and like them. Does Stainless works fabricate a header for the V?
To keep the interior drone /noise down, I would also run cats. Would you guys recomend Random technology cats or what?
What can I expect to pay with for install and parts?
Lots of questions, thanks for any answers

Greg
 

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'05 CTS-V, '00 SLS, 98 SLS, 89 Eldo, '80 Eldo
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I'm the last guy you want posting in your header thread :D
But since noone stepped up yet, I give ya what little I know.
Stainless works does make headers for the V.
Are you near EPP? If so, I would go to them. They know our car.
Corsa is quieter then Magnaflow at idle, but twice the price. With just headers and cats, your fine with the stock exhaust.
RT cats seem to be the best out there.
Can't help on price.

Tony
 

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Discussion Starter #3
I would prefer Corsa but for 1500, I will stick with stock exhaust.
What header is producing the best reslults wtih the LS2. I like stainless works quality, but would be open to Kooks. I do not plan on a cam but at some point may consider L92 heads or other, no forced induction. 1 3/4" tubes would be better for my mods than 1 7/8" primaries?
I have read good things about EPP, seems like they are close, will check them out.
Now would also be the time for a UCC flywheel.
 

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'06 Z06, '05 CTS-V 453rwhp/434rwtq (sold)
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If you are not going to install the headers yourself, I would go to EPP. They sell kooks, and if you buy the headers there they will probably give you a good deal on the install. I think I paid $400 for the install at my local shop. I should have done them myself, but oh well.

Call Luke at Lindsay too to see if he has any kooks sets left - I got mine from him as leftovers from a group buy and got them for the best price I have seen anywhere to date.

I don't even know where to buy stainless works.

The headers will not hurt your LS2 torque - get tuned too and you will see gains everywhere.
 

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2005 CTS-V
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I believe the most important aspect of the exhaust system decision is to plan what the entire system will eventually look like first. You can get there in stages, but you need to know what the final stage will be.

The relative order of the stock exhaust restriction on horsepower is:

1. The cats.
2. The manifolds.
3. The catback system.

I decided that I would never do headers and probably never do a catback because I like quiet. With that decision made, I went with Random Tech cats and a tune, with very good results (as measured on a dyno). The problem with this route, however, is that the RT cats would require modification to work with any headers. I could add any catback because the RT cats interface the same as stock cats.

So if you eventually want headers, you probably should do them along with cats that bolt up to the headers of your choosing. Kooks and B&B, for example, both offer cats that bolt up to their headers.

Finally, you would want to pre-decide on any catback because certain combinations are more compatable in terms of bolt-on. That is B&B catbacks interface best with B&B header/cats and Kooks interface well with Corsa.
 

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Discussion Starter #6
Have a call out to EPP, wiating on a call back from a gentleman named Bob. What do you guys think about doing a flywheel swap. Is it worth the gain in revability vs loss of inertia. Anyone do a UCC with an LS2.
What about the intake manifold?
If EPP does it, I would go Kooks LTs and cats, dynotune and stock exhaust.
 

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2012 CTS-V Sedan, 2011 CTS Coupe, 2010 Ford Raptor
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Have a call out to EPP, wiating on a call back from a gentleman named Bob. What do you guys think about doing a flywheel swap. Is it worth the gain in revability vs loss of inertia. Anyone do a UCC with an LS2.
What about the intake manifold?
If EPP does it, I would go Kooks LTs and cats, dynotune and stock exhaust.
The only one that I know that ran Kooks w/cats and stock exhaust burned through his cats. They said it was because of the stock exhaust. He runs with his cutouts open most the time now.

Personally I dont see the point of headers with stock catback system. If you are looking for a silent sleeper why dont you do a supercharger or N20? The 25rwhp that you will gain from headers/tune (restricted by stock resonators, piping and mufflers) will not be that noticeable.

I added headers for the sound. When racing a stock V, the extra power is enough to slowly walk away...but the sound is AMAZING!

My $0.02
 

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Don't know anything about the cats/stock exhaust problem.
Don't bother with an intake manifold, until you do some motor work (cam etc).
 
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