SCS Professional Series Quick Change Gear Set #5 R09J0035XL 's due to a unique

's due to a unique mechanical advance system developed exclusively by Davis Unified Ignition

3┬ ¼Î“ê₧ and 4┬ ¼Î“ê₧ module and must be used with an MSD 6

Great for street performance and drivability

Edelbrock Performer Intake

SCS Professional Series Quick Change Gear Set #5 R09J0035XL 's due to a uniqueSCS Professional Series Quick Change Gears are made from aircraft steel for maximum strength. Each gear has a shaved finish to minimize backlash and run out, and is broached for proper 10 spline shaft fit. The SCS Extra 5 step heat treating process yields maximum gear life for high stress applications such as big block Oswego Super Modifieds and World of Outlaws Sprint Cars. Gears have a black oxide finish, and the faces have been lightened to reduce