Tony_W

I have an MY02 WRX. standard down pipe and centre section, but a TSL Gp N back box.

If I change the centre pipe to say a Magnex, would I see any noticeable performance improvement, power delivery change?

Have searched previous topics, with no clear answer..

AndrewC

Very little gain from center with std downpipe, however, noticable gain if done with a decat downpipe.

Moral of this is do the downpipe first.

On your car the uppipe is fairly restrictive also.

Andrew...

Buzzer

Do a search, there has been lots of debate on this or try Hayward and Scotts website. they have published figures on their own system