How much hp gain can I expect to get if I get an exhaust manifold? I've heard to many stories about this part. Check my mod list so you can judge it. I'm sure that this question has been asked before, but I couldn't find anything about it. Thanks a lot everyone.

 

stick with the stock and spend your money on cams real power gains

 

I'm doing that as well, but just wondered about the stock vs aftermarket is.

 

the stock is a perfect manifold for that turbo i would leave it alone

 

turbo magazine did a Dc sport manifold swap into a evo and gained about 11 whp and 4 lbs of torque.

 

Check out the Maxford Header $199 shipped from GruppeS.

 

i heard the jic manifolds are pretty bad ***

 

I got the Maxford. its a very nice one.

 

I go for Bang-for-buck.
The manifold woulf be one of the later mods I do. There are too many other mods that make more HP/TQ than a manifold on stock turbo.

 

Cams are your next big HP mod, then an intercooler, (no matter what others say, I picked up a measurable amount).
Then water/methanol kit so you can kick up boost.
All stock Evos should have the following before an exhaust manifold:
Turbo-back exhaust
Intake
Boost contoller
BOV (good one)
flash or fuel contoller (tuned)
intercooler
intercooler pipes
cams
cam gears
boost accuator
water/alcohol injection
injectors (if future mods planned)
throw a clutch in there somewhere

 

Sounds like a plain. I won't waste my money yet. I'm thinking cams, cam gears and a Flash next.

 

get kelford roadrally cams, i got alot out of them

 

Where at???

 

Upgrade the exhaust manifold later down the road if you plan on upgrading the whole turbo system, engine internals, and have high boost alcohol injection. I've read that the gains are little or none when your not a heavy breather. Also I've read of many problems with leaks, cracking, etc.

If the ugly rusted stocker irratates you, get a polished heat shield from one of the vendors here like, Buschur, GSC, or anyone else that has them

 

Cams are pretty much the next mod in line for you. Just make sure they are installed correctly after thurough research on the topic. No matter what combination of mods are used, cams are guaranteed for HP as well as a little torque