Prothane 14-1125 Polyurethane Rear Sway Bar Bushing Kit 21mm

The Prothane 14-1125 is a 21mm polyurethane rear sway bar bushing kit designed to replace the factory rubber stabilizer bar bushings. Upgrading from soft OEM rubber to Prothane's performance-grade polyurethane delivers noticeably firmer bushing support, reduced body roll, and more consistent rear wheel alignment under cornering loads.

Unlike rubber bushings—which deflect under lateral load and allow the sway bar to shift position—polyurethane maintains its shape and grip, effectively improving stabilizer bar performance without requiring a larger-diameter bar. The result is flatter cornering, improved traction, and more even tire wear.

Key Features:

• 21mm bore diameter — precision-fit for the factory rear stabilizer bar
• Grooved bore design — channels hold Prothane super grease for quiet, squeak-free operation
• Premium polyurethane construction — resists road salts, grime, UV exposure, and weathering that degrade rubber over time
• Sold as a pair — complete kit for both sides of the rear axle
• Available in red or black — add suffix -BL to part number for black version
• Lifetime warranty — backed by Prothane's manufacturer guarantee
• Made in the USA

Installation is straightforward and requires no special tools beyond basic hand tools. Be sure to apply the included super grease to the bushing bore at installation to ensure quiet, long-lasting operation.