Spacer is designed to be bolted to the standard frame mount of our (SQ5130254) air spring kit. Provides 5” of space to fit most 6” lifts, or when used with the axle spacer (SQ5130275) (4”) or SQ5130300) 6” can accommodate up to a 10” lift. 4° to 20° pinion angle adjustments (in 4° increments) are provided to fit most situations. Please contact us to determine the best route to use for your truck prior to ordering.