I've run into a bit of a problem. I'll give you a brief description and see what kind of suggestions come up. Please, anyone with any opinion, feel free to share.

I'm limited, due to the install, to shorty-style headers ONLY. There is no way I can fit anything but stock manifolds or shorty headers into the car. Because of this, I picked up a set of '03 LS6 exh manifolds hoping this would be the best flowing of the lot. I'm running TEA Stage I heads, a Comp 224/224 .581/.581 112LSA +4 and I have an open intake (4" pipe from ported TB to stock de-screened MAF, to 900cfm K&N cone intake). I have NO idea how to match up the exhaust side with the relatively unrestricted intake. I planned on picking up a 3" x-pipe and sidepipe "boom" setup from Dr. Gas and trying to make the best of it.

Does anyone have any idea how I can better match the exhaust side to the intake?

 

The '03 manifolds will flow well, but they are still going to be your bottleneck as far as exhaust flow goes. Idont see any reason to go overkill on the rest of the exhaust system when the manifolds are your bottleneck. An Idea might be to post here and go over to corvetteforum and post about gains on X-pipes, catbacks, and other exhaust setups on stock manifolds.

<small>[ February 07, 2003, 07:51 AM: Message edited by: niphilli ]</small>

 

you can port the manifolds still though, gasket match them to the heads and smooth the castings inside.

 

You might want to talk to Lou at LGM and see if he has something that works.. I know he has a set of killer C5 headers..

 

There is a company that can port the stock manifolds by flowing some type of abrasive media through them. Alot of the guys in stock muscle car class do this because they are limited to stock type manifolds. Its not as good as headers but its definatly an improvement. I think the name of the company is extrude hone, but I'm not sure.

 

Matching the intake to exhaust flow also has alot to do with the dynamics going on inside the motor itself. Instead you should be matching your exhaust setup to a certain horsepower level (which corresponds to a certain flowrate the exhaust must be able to support).

 

Just build a set of custom long tubes...that's what I did for my car <img border="0" title="" alt="[Big Grin]" src="gr_grin.gif" />