Proform Full Roller Rocker Arm - 5/16 in Pedestal Mount - 1.70 Ratio - Blue Anodized - Small Block Ford - Set of 16 H75300354 Activates fan #2 at 10

Activates fan #2 at 10 degreesF warmer than fan #1

We also have a smaller diameter Viton seal available for triple spring applications

Lucas Fuel Treatment should definitely be used in vehicles that require leaded fuel because it actually replaces the benefits of lead in gasoline without causing harmful emissions

Flat seams to reduce pressure points

Intended as stock performance replacement for 2-bbl street applications

Proform Full Roller Rocker Arm - 5/16 in Pedestal Mount - 1.70 Ratio - Blue Anodized - Small Block Ford - Set of 16 H75300354 Activates fan #2 at 10Proform Extruded Aluminum Roller Rocker Arm 66878 1. 7 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,