BRAND/PART NO.:IMPCO VPV ***FOR 4 CYLINDER ENGINES***APPLICATION:MDL. J, E AND LREGULATORSPURPOSE: GIVES EXTRA POWER BOOSTDURING HIGH LOADWhen engine load is low and manifold vacuum is high, the VPV is held closed by the strong manifold vacuum signal. When the engine load is high and manifold vacuum is low, the weak manifold vacuum signal allows the VPV to open and richen the air fuel ratio. This will give you extra power when the engine is under high load.Only the VPV and restrictor is included.Vacuum hose, F4-8 and F4-2 fittings soldseparately.MOST ORDERS SHIP IN 2-10 BUSINESS DAYS, FREE SHIPPING TO THE 48 STATESSHIPS SAME DAY AS ORDERED(IN MOST CASES)Be sure to add me to your favorites list!Check out my other items!Sign up for PayPal; the fast, easy, and secure way to pay online.We have thousands of parts in stock, send us a message if you do notseethe part you need!Feel free to ask us about conversion kits for almost anything including trucks, cars, generators, tractors, boats, motorcycles, RVs etc. We can build a kit to convert almost any engine!