The SPL RCAB S550 kit is engineered to upgrade the rear lower control arm bushings on your S550 Mustang by replacing the soft factory rubber bushing with a high-strength spherical bearing. This upgrade delivers significantly improved rear suspension consistency, better handling, and reduced wheel hop—without a major increase in NVH (Noise, Vibration, and Harshness).
✅ Eliminates Rubber Bushing Deflection – Enhances stability under hard cornering and launches
✅ Massive Spherical Bearing Upgrade – Replaces the weak rubber bushing for long-term durability
✅ Maintains Quiet Operation – Minimal added NVH despite solid bearing upgrade
✅ Improves Toe and Camber Stability – Consistent alignment under load and roll
✅ Reduces Wheel Hop – More traction during aggressive launches
✅ Sold as a Pair – One kit covers both rear control arms
✅ Made in the USA
🔹 2015+ Ford Mustang S550 Chassis
From the factory, the S550 Mustang rear lower control arms use one spherical bearing and one rubber bushing, which leads to inconsistency under high loads. SPL’s solution replaces the weaker component with a matching high-performance bearing, eliminating mixed compliance and unlocking your suspension’s full potential—perfect for track use and spirited driving.