Stock z6 with oem hg and arp studs with 200psi in cylinders. Have a dyno crome tune with old built y8 which threw a rod. Have Crome and burn 2. Did some adjustments to ignition from 10 degrees to 16.50 degrees so car runs awesome but can it handle 1 bar with a to4e t4 compressor and a .63 hot t3