Hey all i recently started pulling down my RB25 DET due to a loss in power and i was planning to send my turbo away to GCG to get it Hi-Flowed anyways. In the process i found a substantial crack in my exhaust manifold so now i am re thinking the hi flow option as now i need a new exhaust manifold. My end goal is running 300rwkw which i knew was a stretch for a Hi-Flowed anyway. My question is now that i need a new manifold am i better off getting an aftermarket manifold and t3/t4 turbo or just replacing it with a stock one and running the Hi-Flowed?