EPROM CHIP UPGRADE (existing perf. chip) L98 (C12000)

Follow these guidelines for upgrading your engines computer chip. What modification stage is your engine in now? * STAGE 1: Air Foil, Fuel Pressure Regulator, K&N Filter, Modified MAFS * STAGE2: Headers, Performance Mufflers, Ported Plenum Big Tube Runners, 52mm Throttle Body * STAGE 3: Cylinder Head Porting, Performance Camshaft * STAGE 4: 383/406 c.i. Displacement, Supercharged, Nitrous. APPLICATION: ALL / ALL

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