This 2015 Chevrolet Camaro Z/28 had our Stage 3 675HP NA Package that we installed previously. The customer wanted more power, so we got with our friends at ProCharger and spec'd their Stage II System with the D-1X head unit. We got with Squash Performance, Injector Dynamics and Alky Control to handle the additional fueling needs. The Z/28 made an impressive 838 WHP and 644 WTQ at 8psi!!