Fits: 2001 Thru 2010 Chevy Silverado/GMC Sierra 2500HD/3500HD LB7/LLY/LBZ/LMM Duramax Diesel This Brand New LBZ based S&S 14mm High Speed Stroker Pump is a great option for any customer looking to get the most power and flow out of a single CP3 set up. This high speed 14mm Stroker Pump is optimized for high speed performance above 4,000 RPM's. The 14mm pump is modified to eliminate the fuel flow restrictions that begin at 3000 RPM on stock CP3's. This pump can also be used in a LML CP3 Conversion(tuning may be required). Features: ⦁ Peak output of approximately 450+ L/Hr at 5,000 RPM ⦁ Brand New latest generation Bosch CP3NH base ⦁ All units fully tested and come with a data sheet Notes: Brand New Pump (No Core Needed) Tuning is REQUIRED if installing on 2001-2005 LB7 and LLY engines Fitment on LB7's requires you to modify the regulator connectors to make them fit. THE MANUFACTURE, SALE, OFFER FOR SALE, OR INSTALLATION OF THIS PRODUCT IS NOT LEGAL IN CALIFORNIA.