Proform Full Roller Rocker Arm - 5/16 in Pedestal Mount - 1.60 Ratio - Blue Anodized - Small Block Ford - Set of 16 420-01 12 V DC Magnetic Signal

12 V DC Magnetic Signal Stabilizer

Tensioner Assembly w/Grooved Pulley LS

5/8" x 1" O

Aluminum Housing

570" ID that works well with our 925 and 939 dual valve springs

Proform Full Roller Rocker Arm - 5/16 in Pedestal Mount - 1.60 Ratio - Blue Anodized - Small Block Ford - Set of 16 420-01 12 V DC Magnetic SignalProform Extruded Aluminum Roller Rocker Arm 66879 1. 6 Ratio 5 16" Stud Precision machined Aluminum Lengthen Valve Train Component Life Reduce Wear On Valve Stem Tips Applications include: Bronco, Continental, Cougar, Country Squire, Custom 500, E 100 Econoline, E 150 Econoline, E 250 Econoline, E 350 Econoline, F 100 Pickup, F 150 Lightning Pickup, F 150 Pickup, F 250 Pickup, F 350 Pickup, Fairmont, Granada, Grand Marquis, Ltd, Ltd Crown Victoria,