Jesel Pro Series Aluminum Shaft Mount Roller Rocker Arm Kit - 1.7 Ratio - Full Roller - Profiler Heads - Big Block Chevy (Set of 16) 21-225-4 Calibrated specifically for circle track

Calibrated specifically for circle track use

1985-1986 Cadillac Cimarron

1979-1989 Chevrolet G10

Features larger runners for increased airflow and revised exhaust ports and larger diameter springs for higher lift camshafts

Jesel Pro Series Aluminum Shaft Mount Roller Rocker Arm Kit - 1.7 Ratio - Full Roller - Profiler Heads - Big Block Chevy (Set of 16) 21-225-4 Calibrated specifically for circle trackProduct Description: Rocker Arm Pro Series Shaft Mount 1. 7 Ratio Full Roller Aluminum Natural Profiler Heads Big Block Chevy Set of 16 Dan Jesel realized early on that the success and demand for his high end valvetrain components was in part dependent on huge valve lifts, unheard of spring pressures and rpm that most thought was impossible. So he started on a 10 year quest to perfect the roller lifter. After nearly nine years of R&D and endless