What's more restrictive? The exhaust or the headers?
- Thread starter Ma70.Ent
- Start date
The exhaust system and catalytic converters especially.
I've heard that the factory exhaust manifold is very efficient and flows quite well.
I've heard that the factory exhaust manifold is very efficient and flows quite well.
^ yeah, one look at the exhaust sytem should clue you in on that. The car has what, 3-4 cats? Maybe only 2-3 on the NA.
*edit*
and there'sthat section that they bend flat and also throw a bend into it also. That can never help.
*edit*
and there'sthat section that they bend flat and also throw a bend into it also. That can never help.
I have taken and ported my exhaust manifold as deep in as I could get. I thought about painting it high temp black but I don't think it will last.
The stock exhaust manifold is fine. Very very well designed. If you want a little bump in power for cheap, pick up a test pipe.
Agreed i was jsut thinking about that.lagged said:
Turbo ones are jsut after the turbo, in the downpipe, and in the "regular" cat converter spot right near the center driveshaft. And the NA one is near the center drifeshaft area as well.
The exhaust is the more restrictive out of the two, especially with the cat. The header were designed nearly flawlessly from the factory.
-Matt
-Matt
I found that if you leave the factory header alone and just go with a 2.5" test pipe. You can pick up about 8 ft lbs. of torque and maybe 4-5 hp. This is an estimate gain from what I tried on mine.
if the stock manifold is designed well i might just have it ported and ceramic coated and leave the heat shields off it.
3" catback + 3" test pipe + Heatwrapped Pacesetter header + 2.5" collector + New gaskets = Best NA exhaust PERIOD.
