Hi guys - recently returned to the Impreza fold after a break of five years. I've bought a nice Hawk Spec C, which was imported into the UK in November Engine wise, the car is pretty much standard apart from an HKS exhaust and intake.

Had a full service and remap for UK fuel, and it made a healthy 349bhp on RCM's rollers, which I'm pretty pleased with. However, I'd like to maximise the potential of the OEM turbo, so was thinking of a freer flowing downpipe fitted with a really decent high flow sports cat. Then replacing the second cat with a decat pipe to further improve flow - all followed by a map tweak of course. I don't want to replace the exhaust as it's performing well enough and it sounds perfect to my ears - lovely and quiet while cruising with a nice bark when giving it the beans.

My question is this: will the car still pass emissions with this configuration? Also, can anyone recommend a really good sports catted twinscroll downpipe? (I see RCM do one).

Many thanks in anticipation
Andy

 

Did you ever find the answer on this

 

since January 2016....

 

Why not?
Maybe the op is still on here or get notifications.
Like over said before... if people dont want threads revived they should be closed with no ability to reply.