The standard stage chart for NAs: Stage: Modifications Required: Approximate M-T HP at Flywheel Stock None 222hp Stage I Performance cat-back exhaust system 234hp Stage II Computer Upgrade & Intake 254hp Stage III Nitrous Oxide & Injector Upgrade 300-320 hp
SGP Chart: Stage: Modifications Required: Approximate M-T HP at Flywheel Stock None 222hp Stage I JWT POP charger & Underdrive pulley 238 hp Stage II JWT ECU Upgrade 250 hp Stage III Performance cat-back exhaust system (also ALC for A-T) 262 hp Stage IV Stillen headers 279 hp Stage V Ported throttle bodies & Matched intake 290 hp Stage VI Injector upgrade & JWT NOS system 390 hp Stage VII SGP head package (porting & 5 angle valve job) 420-430 hp
"If everything seems under control, you're just not going fast enough." Mario Andretti