The 17/22 hybrid comes with its own exhaust manifold, it looks a lot bigger than the VNT-15, and it can resist up to 24 psi boost,, I, I just got my lift pump, 17/22, SBCclutch, OMI, an 11 MM pump,EVO skid plate and in about one week I am going to get my 2.5 DP from PP and my ecu with RC-4-5-6, so I am going to be busy installing all these things.I might be interested in a turbo upgrade, does the 17/20 use the stock manifold or can you use tubular manifolds with it