Chevy SBC 350 1.6 Aluminum Shaft Mount Roller Rocker Arm Set .180 Int. Offset The main difference is that

The main difference is that there is an open area under the plenum chamber

are relatively simple to install

and are ideal for new projects or replacing missing or damaged mounting caps

This system can be wired directly to the transbrake wire

Designed for those who need to fuel their vehicles as fast as possible

Chevy SBC 350 1.6 Aluminum Shaft Mount Roller Rocker Arm Set .180 Int. Offset The main difference is thatSpeedmaster extruded aluminum and stainless steel shaft mount rocker system includes steel shafts with pedestals. All rockers feature large needle bearings and roller tips. For extreme high performance applications. They not only unleash horsepower, but they also lengthen valvetrain component life and reduce wear and tear on valve stem tips. These rockers are precision machined to ensure consistency and ratio accuracy and have a great looking finish.