Stage One+ (V390)

These maps are designed for an 2005 EVO equipped with a cat-back, downpipe, cam gear (set -3 deg intake and -3 deg exhaust) and any combination of HKS 264/272 camshafts running 91, 93, or 100+ octane fuels. The brass restrictor pill in the boost line just before the factory boost control solenoid must be removed. In addition to raising boost by approximately 2-3psi and holds it more constantly to redline. It is highly recommended that update your factory ECU with our XEDEFlash to allow for higher midrange boost pressures and a higher rev limit.