4" Lift Kit - Toyota Tundra TRD Pro 2015-2021

The ReadyLIFT Pro Plus 4 lift kit is specifically designed for 2015-2021 Toyota Tundra TRD Pro trucks, offering a 4" front lift while retaining the original 2" factory lift, equating to a total height similar to a 6" lift on standard Tundras. This kit allows continued use of factory Bilstein/Fox coil-overs and reservoir rear shocks, and maintains all factory TRD Pro suspension components. It is compatible exclusively with 2015-2021 Tundra TRD Pro models equipped with Bilstein/Fox coilover shocks, but incompatible with the TRD rear sway bar option and the factory front skid plate. The kit requires factory 20" wheels and is not suitable for some factory 18" wheels, though properly sized aftermarket wheels are acceptable. The 44-5640 Pro Plus 4 inch lift kit features laser cut, CNC bent, welded, and boxed subframe drop assemblies that enhance suspension geometry and increase ground clearance by 2 inches. Its iron knuckles are CNC machined for a precise fit and allow retention of factory tie rods, eliminating the need for cutting or replacement. The 4 inches of lift is achieved through offset top mount spacer design attached to the factory coilover/strut, ensuring a factory ride quality and maintaining the original track width. The kit includes a differential drop kit for easy installation and correct positioning of the differential, preserving optimal CV axle and drive line angles. It focuses on maintaining proper alignment and geometry specifications, thereby reducing tire wear. The rear of the kit contains OEM-style cast iron rear lift blocks, longer u-bolts with hardware, bump stop extensions, sway bar frame mount brackets, and shock stem extensions for the Bilstein/Fox reservoir shocks. The kit supports up to 35" tires on a 9" wheel with a +25 offset, minimizing the risk of rubbing. Removal of front mud flaps may be necessary depending on tire tread design.

• TRD Pro Plus 4" Lift Kit System
• Compatible with 20152021 Tundra TRD PRO models only
• Made in the USA
• Allows for installation of up to 35" tall tires
• Retains use of both front and rear factory Bilstein/Fox shocks
• Installation time: approximately 610 hours
• Retains stock turning radius
• Compatible with use of stock 20" wheels
• Not compatible with TRD rear sway bar option
• Compatible with 2015 Compatible with 20152021 Tundra TRD PRO models only

Specifications

• California Proposition 65: WARNING: This product can expose you to chemicals including Di(2-ethylhexyl)phthalate (DEHP), which is known to the State of California to cause cancer, and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov/product.
• Fitment: Direct Fitment
• Front Lift Component: Spacer
• Front Lift Height: 4 Inches
• Front or Rear: Front and Rear
• Install Difficulty: Difficult Requires Professional Installation
• Installation Time: 5+ Hours
• Max Tire Size: 35 Inch
• Prop65 Chem1: Di(2-ethylhexyl)phthalate (DEHP)
• Rear Lift Component: Block and U-bolt
• Rear Lift Height: 4 Inches
• Shocks Included: No

Vehicle application overview

Confirm trim, engine, and installation requirements before ordering.

• 2015–2017 Toyota Tundra
• 2019–2021 Toyota Tundra