i person i know is doing this right now with an ebay manfold and just runing 2 waste gates 35 mill for this turbo and some what spec's
It's a t3/t4.
.83 AR exhaust - split pulse, stage 5 wheel
.50 AR compressor - gt35 wheel
It's not ball bearing but it is split pulse, which should help with spool up. I had the manifold modified to match the split pulse design properly.
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1987 BMW 325i Turbo - 400hp
T3/T4 Turbo, 16psi, 4" down pipe and exhaust with race muffler, 38mm wastegate, short runner intake manifold, turbo cam grind, 75mm BBK TBody, Megasquirt EMS, 50lb inj, all urethane bushings, Hyfire VIIC Ignition, ProMaster coil, alcohol injection, Corvette Z06 brakes (13.2' front, 12' rear), 3.25LSD, solid diff mount.