Rocker Arms

These 1.125" tall polylocks fit our 7/16" High Energy Die Cast Aluminum roller rocker arms. Perfect for moderate lift and spring pressure applications.

This 1.125" tall polylock fits our 7/16" High Energy Die Cast Aluminum roller rocker arms. Perfect for moderate lift and spring pressure applications.

Many of the popular engine families utilize a positive stop type of rocker arm attachment, which does not allow for any adjustment and consequently there is no consideration for different cam sizes or other modifications to the engine block and heads...

Rocker Adjusting Nut for Small Block Ford

Perfect for moderate lift and spring pressure, these High Energy polylocks fit 7/16" stud rockers.

Perfect for moderate lift and spring pressure, this High Energy polylock fits 7/16" stud rockers.

Perfect for moderate lift and spring pressure, these High Energy polylocks fit 3/8" stud rockers.

Perfect for moderate lift and spring pressure, this High Energy polylock fits 3/8" stud rockers.

Tapered for extra strength in locking points, our Magnum polylocks are 1.300" tall with a .665" diameter for use with 7/16" stud rockers.

Tapered for extra strength in locking points, our Magnum polylock is 1.300" tall with a .665" diameter for use with 7/16" stud rockers.

Tapered for extra strength in locking points, our Magnum polylocks are 1.300" tall with a .612" diameter for use with 3/8" stud rockers.

Tapered for extra strength in locking points, our Magnum polylock is 1.300" tall with a .612" diameter for use with 3/8" stud rockers.

The best polylock for high end race applications, these Hi-Tech polylocks are designed for 3/8" Ultra Pro Magnum and Ultra Pro Magnum XD rockers.

The best polylock for high end race applications, this Hi-Tech polylock is designed for 3/8" Ultra Pro Magnum and Ultra Pro Magnum XD rockers.

Engine Rocker Arm Adjusting Screw