It's a daveh manifold with an IHI GM-4 turbo. I'll only be able to run around 7psi on stock compression/timing/fuel but that should be good enough for around 300whp. I'll be running a fmic with a tial wastegate and a HKS SSQV BOV. The downpipe and such is 3" and will be feeding into my 3.5" catback.