sorry if this has been posted before,
i know the 4x4 has better spool response compared to the longer 2wd manifold. (which means its better) but will it struggle with 450+ bhp?

iv got my heart set on a gt3076. id love to use the 4x4 manifold for extra spool abillity but will it kill power?

im also stuck on the exhaust housing A/r. if i use 4x4 manifold then .82, but if i use 2wd manifold i was thinking .63. is my theory right here?

and infomation is appreciated,