Westin 2005-2018 Toyota Tacoma Ext Cab E-Series 3 Nerf Step Bars - SS Tacoma They use floating helical-cut worm

They use floating helical-cut worm gears that lock the torque down when acceleration or wheel slippage occurs

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Keep the check engine light off with MagnaFlow California Grade CARB Compliant Direct-Fit Catalytic Converter 5551444

Westin 2005-2018 Toyota Tacoma Ext Cab E-Series 3 Nerf Step Bars - SS Tacoma They use floating helical-cut wormWestin(TM) E Series Nerf Bars are made of 3in. diameter round tubing and are vehicle specific designs. Step design and mounting technique varies by application (mounting kit included). They feature recessed area mounted step pads unique to E Series Nerf Bars feature the Westin(TM) brand name and are UV resistant. Installation Instructions