Originally Posted by nobrakese28
I use to work in Aerospace composites, I can say that piece is a beauty. Extremely tricky geometry. 4200 is pretty expensive, but that would be a wicked option. What are the gains (hp,tq)?
I imagine it's pretty close to CSL numbers, which is probably another 15hp over headers. There's a dyno video here
, he got 306 HP.
From what I hear you do this mostly for the glorious induction noise. $ per HP you're much much better off doing forced induction. This is only for the purists that want to keep it NA.
Imran: Make sure you post on the Z4-forum which is the UK version. I'm really hoping you guys go through with this