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.

Kit Options

This item is available as a full kit.
Select a kit option in the following table if you are looking for this item in a bundle form with all associated components.

Kit option/s:

Thumb	SKU	Kit Title
	fabK1157	Fabtech 20-21 GM K2500HD 3.5in Bj UCA Kit w/Perf Shks (2x fabFTS7299, 2x fabFTS7341, 1x fabFTS21276)
	fabK1157M	Fabtech 20-21 GM K2500HD 3.5in Bj UCA Kit w/Stealth (2x fabFTS6019, 2x fabFTS6341, 1x fabFTS21276)
	fabK1157DL	Fabtech 20-21 GM K2500HD 3.5in Bj UCA Kit w/Dlss (2x fabFTS810942, 1x fabFTS21276, 2x fabFTS811532)
	fabK1158DL	Fabtech 20-21 GM K2500HD 3.5in Bj UCA Kit w/Dlss Resi (2x fabFTS810942, 1x fabFTS21276, 1x fabFTS801532D, 1x fabFTS801532P)
	fabK1179	Fabtech 20-21 GM K3500HD 3.5in Bj UCA Kit w/Perf Shks (2x fabFTS7299, 2x fabFTS7341, 1x fabFTSBK21, 1x fabFTS21276, 1x fabFTS755)
	fabK1179M	Fabtech 20-21 GM K3500HD 3.5in Bj UCA Kit w/Stealth (2x fabFTS6019, 2x fabFTS6341, 1x fabFTSBK21, 1x fabFTS21276, 1x fabFTS755)
	fabK1179DL	Fabtech 20-21 GM K3500HD 3.5in Bj UCA Kit w/Dlss (2x fabFTS810942, 1x fabFTSBK21, 1x fabFTS21276, 2x fabFTS811532, 1x fabFTS755)
	fabK1180DL	Fabtech 20-21 GM K3500HD 3.5in Bj UCA Kit w/Dlss Resi (2x fabFTS810942, 1x fabFTSBK21, 1x fabFTS21276, 1x fabFTS801532D, 1x fabFTS801532P, 1x fabFTS755)

• 2 to 3 Hours Installation
• No Cutting Required
• No Drilling Required
• No Driveshaft Modification
• No Loss Of Ground Clearance
• No Welding Required
• Simplified Design With Fast Install
• Steering Knuckles Retain Proper ESC