This system offers a mild lift height with easy installation for clearance of 33" tall tires on K1500s. Lift is accomplished with Dirt Logic 2.5 Coilovers that provide superior damping for aggressive offroad use and a good highway ride. The stock upper control arms are replaced with high quality tubular Uniball arms that allow unrestricted movement throughout the travel range. The arms are constructed of top quality material including .120" wall 4130 Chromoly tubing with a 1.50" OD and 1" FK Stainless PTFE Uniballs. These arms are the best on the market for aggressive offroad driving in harsh conditions. The front differential is relocated to keep CV angles proper with the new lift height while a 1/4" thick steel skid plate provides protection against offroad obstacles. Rear lift is accomplished with 1 1/2" rear lift block and u-bolts to help level the stance of the vehicles. Dirt Logic 2.25 rear shock absorbers replace the stock units for increased damping for both on and offroad use. -Best in class system for aggressive offroad use and good highway ride. -Increased ground clearance. -Top quality Uniball Upper Control Arms for aggressive offroad use. -1" ID American made FK Uniballs with PTFE for ultimate strength. -Includes Dirt Logic 2.5 Coilovers for superior damping. -Increased fender clearance compared to a Leveling Kit for 33" tall tires. -Suspension can be restored to stock.. This new 4 System capitalizes on Toyota Tundras large wheelwell opening to allow use of 35 tall tires with minimum lift height. The design of this 4 System is a new style of suspension that delivers improved performance with fewer parts, and comes with an affordable price. The system includes replacement upper control with a .120 wall DOM arm with heavy duty extended range ball joints that provide additional strength to the front suspension. Heavy duty extended length steering knuckles are included to provide proper functionality of the factory ESC (Electronic Stability Control) with 35 tall tires. The knuckles retain the stock track width keeping the tires under the front fenders. The front differential is relocated to keep CV angles proper during the full range of travel. Front bump stop extensions and brake hose relocation brackets complete the front suspension. Rear lift comes from a 1 lift block and u-bolt system to level the stance of the vehicle. The 4 System is available with a spacer system to retain the factory Coilover shocks and rear Performance shocks.. TIRE SIZE - 33/12.50R17 WHEEL - 17X8 W/4 1/2" BS W/MINOR TRIMMING; TIRE SIZE - 275/65R18 WHEEL - 18X8 W/4 1/2" BS W/MINOR TRIMMING; TIRE SIZE - 295/55R20 WHEEL - 20X9 W/5" BS W/MINOR TRIMMING; 1. WILL NOT FIT MODELS WITH FACTORY AUTORIDE SHOCKS.; 8. WILL NOT FIT ALL WHEEL DRIVE MODELS.; 14. CAN NOT USE OEM WHEEL AND TIRE.; 17. DOES NOT FIT STANDARD CAB.; 127. FITS MODELS WITH FACTORY FORGED SILVER ALUMINUM UCA OR STAMPED BLACK STEEL UCA.. Fabtech 14-18 GM K1500 w/OE Alum. UCA 4in Uniball UCA System w/DL 2.5 Coilovers & Rear DL Shocks. 3.5" UNIBALL UCA SYS W/ DL 2.5 2.25 14-18 GM K1500 P/U W/ OE ALM OR STMP STL UCA. 4in. UNIBALL UCA SYS W/DL 2.5/2.25 14-18 GM K1500 P/U W/OE ALM OR STMP STL UCA. 4in. UNIBALL UCA SYS W/DLSS 2.5 C/Os/RR DLSS 2014-15 GM K1500 P/U W/ALUM SUSP. 3.5" UNIBALL UCA SYS. Suspension Lift Kit. LftKt-Suspw/Shock

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