Ultra Pro Magnum Rocker Arm Set of 8 w/ 1.6 Ratio for Chevrolet w/ 7/16" Stud 2012 Ford Mustang Each bushing is designed by

Each bushing is designed by BMR to exact specifications

Installation: Easy one hour bolt-on installation that requires no drilling or welding and uses OEM hardware

The Edelbrock pulley part #15820 allow you to fine tune the airflow and performance of your Edelbrock Supercharger System to your preference

The 500 Series Is a great High Performance Disc In The Single Disc Platform

It is a direct bolt-in replacement for both street and track use

Ultra Pro Magnum Rocker Arm Set of 8 w/ 1.6 Ratio for Chevrolet w/ 7/16" Stud 2012 Ford Mustang Each bushing is designed byUltra Pro Magnum Rocker Arm Set of 8 w 1. 6 Ratio for Chevrolet w 7 16" Stud