Prothane 8-1121 21mm Front Sway Bar Bushing Kit Polyurethane

The Prothane 8-1121 is a front stabilizer bar bushing kit engineered to replace worn, soft OEM rubber bushings with firm, high-performance polyurethane. Upgrading to polyurethane sway bar bushings delivers a tighter grip on the stabilizer bar, reducing body roll and improving cornering response — delivering a handling upgrade comparable to installing a larger-diameter sway bar at a fraction of the cost.

Prothane polyurethane resists breakdown from road grime, oils, and weathering that can cause factory rubber to warp, crack, and lose its grip over time. These bushings maintain their shape and secure hold throughout the life of your vehicle, keeping your sway bar functioning at full effectiveness.

Key Features:

• Fits 21mm front stabilizer / sway bar (anti-roll bar)
• Premium-grade polyurethane construction — firmer and more durable than OEM rubber
• Grooved bore design holds Prothane Super Grease for quiet, squeak-free operation
• Precision fabrication ensures a proper, rattle-free fit
• Available in red or black — identical durometer/hardness between colors
• Made in the USA
• Backed by Prothane's Lifetime Warranty against defects in materials and workmanship

Kit includes both left and right bushings. Prothane Super Grease should be applied to the bore during installation to ensure quiet, long-lasting performance. Also compatible with larger-diameter high-performance aftermarket sway bars of the same size.