Any difference between the OEM wrx and sti exhaust manifolds for 2004 models and if so would there be any benefit installing sti one on wrx.
Planned upgrades on my 04 wrx wagon are VF35 turbo (or similar), sti or classic up pipe, decat one piece downpipe, sti pink injectors, 255lph fuel pump and maybe sti top mount and remap.

Thanks, John

 

Yep, It's painted red

 

Sorry, meant the exhaust manifold

 

Don't think there is any diference other than cat in wrx up pipe
could be wrong though

 

Talk to harvey on here about his ported and wrapped headers and uppipe, they'll improve the spool noticeably

 

No difference in WRX or STI headers apart from the catted uppipe on the WRX

 

Cheers

 

Headers, WRX/STi are identical.
As Gaz says above WRX has CAT in uppipe.