All the benefits of our AP™ Rings plus the added performance of our Gas-Ported Rings

Utilizing superior 440B stainless steel for longer life and precise tolerances. Thinner, flatter and lighter construction conforms better to the cylinder wall

Developed specifically for racing classes where Claiming rules are in effect

Exacting tolerances for Improved sealing between piston and piston ring

HSS Diesel • Severe Duty • Gapless

Patented Top or 2nd Piston Rings eliminates blow-by, increasing horsepower & torque

Gas-ported performance without gas-ported pistons

Provides tighter tolerances, sharp-edge technology and PVD coatings

Ultimate in durability over any other material commonly used in piston ring manufacturing for extreme environment

Ndurance Expanded Performance Oil Rings were specifically designed with turbo and high boost engines in mind

HORSEPOWER GAIN vs. COST. THE TOTAL SEAL® VALUE ADVANTAGE.

Engineered for extreme abuse such as nitrous oxide, turbocharged, supercharged and high cylinder pressure applications

Unique Radial Notch design allows ring to “conform” to cylinder wall to provide increased horsepower and torque while reducing blow-by

Offer maximum efficiency and significantly reduced friction for normally aspirated engines