THIS IS A GENUINE GM & REDLINE USA CAM KIT ASSEMBLED BY OUR EXPERT ENGINEERS TO CREATE THE HIGHEST QUALITY CAMSHAFT KIT AT AN AFFORDABLE PRICE. EVERY PART IN THIS KIT HAS A HIGH-PERFORMANCE SPEC RATING AND IS GUARANTEED TO BE OF THE HIGHEST OF QUALITY AND PERFORMANCE. For use in Gen 4 engines only (camshaft sensor on front of engine in timing cover). Will not work on Gen 3 engines with the cam sensor located behind the intake manifold. GM trucks typically started using Gen 4 engines in 2007. THIS LISTING WILL INCLUDE: (1) GENUINE GM 12689035 CAMSHAFT - 190/191 .466"/.457” 114 LSA - NON-DOD/AFM 16) HIGH-PERFORMANCE LS7 STYLE ROLLER LIFTERS 4) LIFTER GUIDES 16) PUSH RODS - 7.397" LENGTH. 5/16" DIAMETER. LIFETIME WARRANTY IF INSTALLED BY A CERTIFIED MACHINIST For use in Gen 4 engines only (camshaft sensor on front of engine in timing cover). Will not work on Gen 3 engines with the cam sensor located behind the intake manifold. GM trucks typically started using Gen 4 engines in 2007.