Wedge-Locking Header Bolts Hex Head M8 X 1.18 1 Inch Chevy LS Nickel Plt 12 Pcs Proform Race Car Gas Can Scale 400 LB Capacity 0.1 LB Resolution Backlit LCD Display Pounds and Kilograms Proform Engine Rocker Arm Kit

Engine Rocker Arm Kit

you will no longer need to using a ruler to measure spring height

All valve covers are supplied with OEM style oil restricting baffles

Blue Powdercoat Finish

Wedge-Locking Header Bolts Hex Head M8 X 1.18 1 Inch Chevy LS Nickel Plt 12 Pcs Proform Race Car Gas Can Scale 400 LB Capacity 0.1 LB Resolution Backlit LCD Display Pounds and Kilograms Proform Engine Rocker Arm KitEach PROFORM Grade 8 Header Bolt is permanently assembled with a pair of special washers. When the bolt is torqued to 28+ ft lbs, the washers super hardened external teeth bite into and grip the bottom of the bolt head and the top surface of the header. After being self locked in this manner, any bolt loosening rotation is blocked by a wedge locking action created by the washers interfacing, matching cams. Its an uphill climb: vibration that might