Performance, reliability and race proven. HPMX Carbs. offer ultimate engine tuning with total air and fuel metering and adjustment. The HPMX series have separate idle and main circuits featuring changeable air and fuel jets. Intake air is metered by changeable venturies, and the accelerator pump is adjustable for maximum acceleration. Jets, gaskets and repair parts are readily available. All our kits are pre-jetted for most VW engines. Choose the appropriate size carburetor for your application. When future engine modification is planned, size-up now!