(CORE CHARGE OF 100.00 IS ADDED TO THE PRICE) This kit is designed to work with factory OE trucks without tuning and modifications. This will not work on your truck if you have any other tuning or power modifications installed.   No Tuning Needed Our CP3 Conversion Kit is a direct replacement for the factory CP4 and will not cause check engine lights. No need to spend extra money on custom tuning or programmers, our kit works with the factory tuning. Emissions Compliant Our CP3 Conversion Kit has been designed to be used with all of the factory emissions equipment. Your truck will run as if it was from the factory. Proven Reliability The CP3 fuel pump is proven to have longevity and to be reliable in performance applications. Remove the Worries The CP4 has known failure issues that cannot be remedied. These issues, if they occur, can cause damage to other major fuel system components. 10mm Stroker Shaft To help increase rail pressure when fueling to higher rpms we have designed these pumps with our industry leading 10mm stroker shaft.