ReadyLIFT leveling kits are the fastest, safest, least expensive way to bring the front of your vehicle level with the rear. Our innovative Smart Strut Technology mounts on top of the strut assembly, eliminating the hassle, time and danger of compressing springs. ReadyLIFT steel strut extension will maintain a smooth OEM ride without adding pressure to stock suspension components, guaranteed!  The 66-4000 strut extension provides 2" of lift which gives clearance to add up to 33" wheels and tires to the 2004-2007 Nissan Titan, Nissan Armada, and Infiniti QX56.  For information about tire and wheel sizes please visit the ReadyLIFT.

33" Maximum tire diameter

33x12.50 for no rub on a 9" wide wheel with +12 offset

17" - 33X12.5R17

18" - 305/65R18

20" - 305/55R20 - 33X12.5R20

22" - 33X12.5R22

When lifting a vehicle and installing aftermarket wheels and tires, a tire manufacturer's construction and material quality can alter vehicle ride quality. When increasing a vehicle wheel and tire size, most larger aftermarket truck and SUV tires are 8-ply (or more) E tires compared to typical OEM 6-ply C tires. This more rigid sidewall construction increases the perception of suspension stiffness often described as ride harshness. The ride, handling, traction, noise, fuel economy, and wear differences between All-Season, All-Terrain, Mud-Terrain, or Trail-Terrain type tires can be significant. Please take into account tire and wheel choice will generally have a meaningful impact on the ride & handling experience.