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.

This Part Fits:

Year	Make	Model	Submodel
2014-2015	Chevrolet	Silverado 1500	High Country
2009-2013	Chevrolet	Silverado 1500	Hybrid
2007-2013,2015	Chevrolet	Silverado 1500	LS
2007-2015	Chevrolet	Silverado 1500	LT
2007-2015	Chevrolet	Silverado 1500	LTZ
2015	Chevrolet	Silverado 1500	SSV
2007-2015	Chevrolet	Silverado 1500	WT
2010-2013	Chevrolet	Silverado 1500	XFE
2007	Chevrolet	Silverado 1500 Classic	Hybrid
2007	Chevrolet	Silverado 1500 Classic	LS
2007	Chevrolet	Silverado 1500 Classic	LT
2007	Chevrolet	Silverado 1500 Classic	SS
2007	Chevrolet	Silverado 1500 Classic	WT
2007	Chevrolet	Silverado 1500 HD Classic	LT
2014-2015	GMC	Sierra 1500	Base
2007-2015	GMC	Sierra 1500	Denali
2009-2013	GMC	Sierra 1500	Hybrid
2007-2013	GMC	Sierra 1500	SL
2007-2015	GMC	Sierra 1500	SLE
2007-2015	GMC	Sierra 1500	SLT
2007-2013	GMC	Sierra 1500	WT
2010-2013	GMC	Sierra 1500	XFE
2007	GMC	Sierra 1500 Classic	Denali
2007	GMC	Sierra 1500 Classic	Hybrid
2007	GMC	Sierra 1500 Classic	SL
2007	GMC	Sierra 1500 Classic	SLE
2007	GMC	Sierra 1500 Classic	SLT
2007	GMC	Sierra 1500 Classic	WT
2007	GMC	Sierra 1500 HD Classic	SLE
2007	GMC	Sierra 1500 HD Classic	SLT