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Timbren SES Suspension Enhancement System SKU# TORTUN4 - Rear Kit

This SES Suspension Upgrade fits the rear suspension of a Toyota Tundra, Tacoma & Nissan Titan truck (see below for full list of applications). Each laser cut piece of steel is welded and powder-coated to ensure a quality fit. We’ve engineered our hollow rubber springs to deliver a progressive spring rate. In other words, the more weight that pushes down on the rubber springs the harder they work to prevent rear end sag. Whether you’re pulling a trailer or carrying a heavy load in the bed of your vehicle, our hollow rubber springs adjust automatically to keep the vehicle level at all times.

This SES Suspension Upgrade replaces the jounce stop on the frame. Its unique design ensures superb ride quality – loaded or unloaded. (There should be a ½” to 1 ½” gap between rubber spring and frame to ensure unloaded ride quality.) Unlike other auxiliary spring systems, the SES Suspension Upgrade guarantees the best of both worlds.

TORTUN4* replaces the bumpstops on the rear suspension of the 2000-2021 Toyota Tundra pickup truck models. *For a complete listing please refer to the FITMENT tab below.

This kit is rated at 6000 lbs capacity. Even though you’re increasing the spring rate by adding this upgrade, this does not increase the GVWR (Gross Vehicle Weight Rating). Please make sure that the load does not exceed the GVWR set by the manufacturer.

Installation Instructions: TORTUN4
Compatible Vehicles:


2000-2021 Toyota Tundra
2016-2022 Toyota Tacoma (4 Leaf OEM Rear Spring)
2004-2023 Nissan Titan 4x2