Check the listing for details. HAPCO - 16 oz. Lead Substitute Fuel Additive - 2 PACK. Condition: New. Listed at 35.98 USD. Lead Substitute - 2 PACK Use to quickly prevent valve recession and wearProvides maximum lubrication to any fuel systemHelps stop power and compression lossOne bottle treats up to 25 gallonsSafe for any type of fuel systemHapco Lead Replacement Formula provides maximum lubrication to any fuel system. This formula is designed to help fuel become more efficient and increase fuel economy. It replaces lead while acting as an octane booster and valve lubricant. Does not contain solvents or lead. For Best Results: Use regularly as you fill up. One bottle will treat up to 25 gallons. Great to use in all gasoline, diesel and marine engines. Sensor safe and will not harm oxygen sensor or catalytic converter. Size - 16 oz. - 2 Pack Part No. - 2900P2 Made In USA - Money Back Guarantee - Proven Results Since 1960 Visit HapcoProducts.com to learn more!