hey guys, in a quest to find out why my track times were so bad(besides my driving), I am trying to figure out what is wrong with my car. Compression has checked out good, ignition is good, and it is getting plenty of fuel. The thing I though of is that I have a DC header for a Z6 motor and I have a Y8. Should that make any diffrence. Is it like when you use a header on a ZC and you need to port it?? Thanks for the Input.

 

i dont think it should, all d series parts are interchangable

 

Nope it won't fit. Different bolt pattern.

 

not all parts are interchangeable