Integra 451 Series Avenger Steel Mono-Tube shocks deliver the quality and performance you expect lap after lap. A floating piston separates the nitrogen from the fluid to eliminate foaming effects on the damping force. Integra's 451 Steel shocks are available in both Schrader valve and a Non-Schrader valve design to comply with your sanctioning bodies rules. Advanced shock technology, an economical monotube design, and consistent winning results are what Integra Steel Avenger series shocks will bring to your ride.