3400 ported exhaust manifolds and down pipe
 

MMS Economy Stainless Downpipe for 3100 and 3400 powered 97-03GP/00-05MC/Imp - Milzy Motorsports

3100/3400 Ported Exhaust Manifolds - Milzy Motorsports

On my 3400 i have a Wizaired intake from ZZP, L67 coil packs, 2.5" cat back exhaust, and i will have my car tuned from Overkill before i do these mods.

The downpipe will get rid of the u-bend as well

What kind of gains do you think i would get with these? I'm not sure how i feel about the down pipe but i'm strongly considering the exhaust manifolds. Also would i have to port my intake manifolds? Add any more input please