The Big Gun X Series Double Adjustable Monotube shocks are specifically valved for extremely high horsepower drag radial tire equipped applications. With this valving package, chassis tuners can better control the hit to the tire using this series of shocks. Drag radial competitors require a unique valving package to control the rear suspension and properly apply the radial tire to the track. Don't drive thru your shocks with that big power! If you have 1,500+ horsepower and are on a drag radial tire, this is the valving package you need to complement your race program. Choose this series of shocks for the ultimate control off the line and superior traction down track. For quicker adjustments, mount your AFCO shocks upside-down for unsprung weight savings and easier access to the rebound adjuster. Double Adjustable - broad range of adjustment. Big Gun X Valving - specifically valved for extremely high horsepower applications: ODR, Outlaw 275, X275, 10.5, T/S, and T/D. Great for BIG or SMALL tire door slammers. Large piston provides superior launch and down track stability. Gas pressure eliminates cavitation and allows shock to recover faster. Body Mount: 1/2 I.D. Bearing (1 wide).Shaft Mount: 1/2 I.D. Bearing (1 wide).