Proform Calibration Spring - Heavy/Medium/Light RPM Module Chip Progressive throttle pulley and double Offered with choice of QRP62-220 Size:4X-Small (32) Driveshaft Slip Yoke

Progressive throttle pulley and double return spring

5/8 in 36 Spline to 3/4 in Double D

Overflow Check Valve

Created for High Horsepowered Race Cars Each kit includes 1/4" thick housing and frame brackets (most competitors kits have 3/16" brackets) with 5/8" mounting holes on a 21" radius including mounting holes for Wheel-E-Bars

Great for mounting on the door cabinet for easy access

Proform Calibration Spring Heavy Medium Light RPM Module Chip Progressive throttle pulley and double Offered with choice of QRP62 220 Size:4X Small (32) Driveshaft Slip Yoke Progressive throttle pulley and double return spring 5 8 in 36 Spline to 3 4 in Double D