630-650whp with a gtx3076. I made around 480whp previously on a lta legal setup (tomei extractor / dp, but modified cat) with a fp black bb, but the exhaust temps were pretty high even with the tomei dp.

Just change the dp and the cat, it’ll be safer for you to run the fp black with some boost at least. Else change a smaller turbo, better response same power if you wana use the stock dp.

 

was on gt37 on 700whp plus 2.5bar with 3"" straight thru and side plant. am looking how much power people here are pushing with stock exhaust. not necessarily will go that route.