Prothane 7-318 Rear Control Arm Bushing Set Chevrolet GM Polyurethane

The Prothane 7-318 is a rear control arm polyurethane bushing set designed as a direct performance upgrade over worn or deteriorating factory rubber bushings on Chevrolet and GM trucks and SUVs. When OE rubber bushings stretch, flex, and sag over time, suspension alignment shifts and handling becomes unpredictable — the Prothane 7-318 addresses this with a firmer, longer-lasting polyurethane compound that keeps the suspension geometry locked in place.

Key Features:

• Premium polyurethane construction — firmer than OE rubber for improved handling response and reduced suspension deflection
• Superior compliance resistance — helps maintain accurate alignment settings under load and during cornering
• Extended service life — resists sagging, cracking, and deterioration far longer than factory rubber bushings
• Precision-fabricated for a direct OE replacement fit with no modifications required
• Includes Prothane Super Grease — supplied lubricant ensures quiet operation and prevents squeaking after installation
• Available in red or black — both versions are identical in durometer (hardness) and performance; black version contains a small amount of graphite for additional squeak resistance

Installation Note: Control arm bushings are high-stress components. Thorough lubrication with the included Prothane Super Grease during installation is essential for quiet, long-term operation.

NVH Note: As with all polyurethane bushing upgrades, a slight increase in NVH (noise, vibration, and harshness) compared to soft OE rubber is normal. Most performance-oriented drivers find the gain in handling precision well worth the trade-off.

Backed by Prothane's lifetime warranty against defects in materials and workmanship for the original purchaser, the 7-318 is a durable, performance-focused solution for restoring and upgrading rear suspension control on Chevrolet and GM platforms.