Wilwood Drop Spindle Kit - 2-1/2 in Drop - Driver/Passenger - Black - GM Fullsize Truck 1971-87 (Pair) Steel Timing Cover These work with factory upper

These work with factory upper control arms or QA1 upper control arms

Compatibility: MAC Air

High Impedance Injector drivers power Holley EFI and most stock injectors - Injector support chart found in instructions (will not support low impedance injectors)

Programmable Target Air Fuel Ratios per Boost level

2007-2008 GMC Yukon

Wilwood Drop Spindle Kit - 2-1/2 in Drop - Driver/Passenger - Black - GM Fullsize Truck 1971-87 (Pair) Steel Timing Cover These work with factory upperProduct Description: Spindle 2 1 2 in Drop Spindle Driver Passenger Side Steel Black Paint GM Fullsize Truck 1971 87 Pair Wilwood is a leading manufacturer of high performance brake systems and components to fit a wide range of track and street applications. They offer everything from individual components like rotors, calipers, and pads to complete bolt on kits. Wilwood Engineering designs and manufactures high performance disc brake systems. Since