Stock Non-Adjustable Rockers - Rebuilt 1.5 ratio, stock non-adjustable rocker arm assembly, fully assembled and ready to bolt on.

Stock Adjustable Rockers - Rebuilt 1.5 ratio, stock adjustable rocker arm assembly, fully assembled and ready to bolt on.

High Ratio Adjustable Rockers - New 1.6 ratio, adjustable rocker arm assembly, fully assembled and ready to bolt on. Higher ratio rockers increase the valve lift, giving you increased air flow and better performance.

Roller Tipper Rockers - Fully assembled, 1.6 ratio rocker assembly, may require swaping to adjustable style push rods if you are replacing a non-adjustable rocker arm assembly.

Full Roller Rocker Set - 1.65 Rocker Ratio - Includes adjustable, oiling thru push rods and oil thru lifters as the stock oiling system (thru the shaft) is eliminated when removing the old shaft assembly and installing the spacer bars, as seen in the pictures below.

One proven way to increase power is by decreasing the amount of valvetrain friction. Two of the biggest friction hot spots in any valvetrain are those where the rocker fulcrum rides on the shaft or stud, and where the tip of the rocker comes in contact with the valve stem. In basic, simplified terms, the more energy your engine exerts by overcoming these high-friction contact points, the less torque is exerted to the rear wheels. Replace the metal to metal rubbing contact and the engine is going to spend less energy doing the same work.

By placing a roller on the tip of the rocker where it comes in contact with the valve stem, the rocker is able to roll across the valve as it travels through its cycle, instead of sliding back and forth across the valve stem. Beside the obvious friction created here by non-roller tips, serious side loads are placed on the valve stem as the tip drags across the top of it while the valve travels up and down in the valve guide, resulting in eccessive guide wear.

While most will assume that the only benefit of roller rockers is reduction in friction, the other benefits of aftermarket rockers include true, blueprinted, at-the-valve ratios and precision motion. Another time-honored way to increase power with rocker arms is to change the ratio of the rocker. The benefit of increased rocker arm ratio is the valve is opened a little further and faster, allowing more air in and out of the engine, thus creating more power. Changing from a rocker ratio of 1.5 to 1.6 generally adds about 3 degrees of valve duration. The net result is you are effectively changing your cam specs without changing your cam.

The Roller Tipped Rockers come fully assembled a on a new shaft, ready to go. Just remove your old rocker assembly, bolt on the new roller tipped assembly, and adjust the lash. It's that simple.

The Full Roller Rockers require assembly on the head. But it too is a realtively simple procedure. Remove the old assembly, bolt on the spacer bars, install the rockers in pairs, and adjust (see pictures below).  

A)  Installation of  Roller Tipped Rockers or Full Roller Rockers requires pushrods designed to facilitate adjustable rocker arms. Your stock rockers may or may not be adjustable in design, thus the pushrods may be incorrect.   Prior to installation, verify your existing pushrod type.  

B)  Installation of Full Roller Rockers will require  the elimination of the stock rocker arm shaft, thus eliminating the stock oiling system as well. To retain oiling to the valve train, the pushrods and lifters must be changed to an oil through design.

stock head with rockers removed	head with spacer bars installed	with full roller rockers instal
view of spacers and rockers	stock verses full roller rockers	stock verses full roller rocker
customer install	customer install	customer install