db84life
New Member
hey sup guyz and gal....got a friend that have a 99 si block.... my block juz got rebuilt and the guy that did it did a bad job..so i'm wondering if i put a gsr head over the si block... what kind of performance will i get.... will it run ok.... what will be hte compression....what ecu to use.... can i still use my gsr.... have anyone did this b4....if so please let m eknow how the engine run.... thankz