ok this is what i need to know. is the bolt pattern for a b series and a d series the same and the port sizing differnt or what. i need to know cause i need a manifold that don't cost tooo much so i can build a custom turbo job

 

the bolt patterns are different. i'm assuming you're talking about the bolt patterns for the head. people have put a greddy d-series manifold on the b-series with minor modification - something like grinding out the two outer holes. imo, just get one that is made for your motor. your sig says you have a type-r motor and there are plenty of b-series manifold on the market. save yourself the time and hassle.

 

allright thanks