hi guys ive just fitted a harvey up-pipe and ported and wrapped my headers on a 2005 sti , it seems to run ok but will it need a map tweek ? its decated ,uprated fuel pump,k&n short induction,on a standard turbo mapped by andrew carr . was running 338 at scoobyclinic last year with nur spec fitted but ive changed that to a hks silent power . thanx in advance

 

I would recommend a tweak mate will get the most out of the changes you have made but most of all with give you piece of mind knowing that all is well and safe. I have ported headers and Harvey uppipe the difference is very noticeable.

 

Second what harri said, you'll defo notice the difference after fitting those parts... And to get the most out of the mods and safety Id recommend a tweak

Martin