King Pin Beam Bushing Kit, Urethane, 4 Pack

OVERVIEW

Upgrade your air-cooled Volkswagen''s front suspension with the EMPI King Pin Beam Bushing Kit, a premium urethane solution designed to replace problematic factory needle bearings. For decades, VW enthusiasts have struggled with the maintenance-heavy nature of original needle bearings, which are prone to premature wear, seizing, and failure when exposed to moisture, dirt, and off-road debris. These high-density urethane bushings provide a modern, durable alternative that offers a smoother ride and significantly increased longevity. Unlike metal bearings that can pit or collapse under heavy loads, these urethane bushings distribute weight more evenly across the trailing arm, making them an essential upgrade for any King and Link Pin front end, whether you are building a show-ready Beetle or a rugged woods buggy.

This comprehensive 4-pack kit is engineered to be a direct replacement for both the inner and outer needle bearings and the outer grease seals. By simplifying the internal components of your axle beam, you eliminate the risk of needle bearings disintegrating and scoring your trailing arms. These bushings are specifically designed to fit 1.5-inch ID beam tubes and provide a rock-solid foundation that improves steering response and reduces front-end "slop." The integrated outer seal portion measures 2 inches in diameter, ensuring a tight fit that keeps contaminants out of the beam. Whether you are refreshing a classic 1950s Beetle or reinforcing a custom sand rail, this EMPI kit delivers the reliability and performance that Appletree Auto customers demand for their high-performance VW builds.

FITMENT

• VW Beetle (Type 1): 1949 through 1965 (King & Link Pin Models)
• VW Karmann Ghia: 1956 through 1965 (King & Link Pin Models)
• Dune Buggies & Sand Rails: All models utilizing a stock-width or narrowed King & Link Pin front axle beam
• Custom Projects: Any aftermarket King Pin beam with a standard 1.75-inch OD and 1.5-inch ID tube configuration

SPECS

• Material: High-density performance Urethane
• Quantity: 4 Pieces (Complete set for one front axle beam)
• Outer Diameter (Main Body): 1.75 inches
• Inner Diameter: 1.5 inches
• Overall Length: 7.75 inches per bushing
• Outer Seal Portion OD: 2.0 inches
• Compatibility: Replaces both inner and outer needle bearings and seals
• Application: King & Link Pin Front Suspension only
• Manufacturer Part Number: 6524-20 (EMPI)

PRO TIPS

1. Thoroughly Clean the Beam Tubes Before Installation

Before you even think about sliding these new urethane bushings into your axle beam, you must ensure the internal surface of the beam tubes is surgical-grade clean. Use a long-handled wire brush or a hone to remove any rust, old grease, or debris left behind by the old needle bearings. If there are any burrs or sharp edges inside the tube, they can gouge the urethane during installation, which will lead to premature failure and annoying squeaks. A smooth, clean surface ensures the bushing seats perfectly and allows the trailing arm to rotate without unnecessary friction.

2. Use the Correct Lubricant to Avoid Squeaking

Urethane is famous for its durability, but it is also known for "squeaking" if not lubricated properly. Do not use petroleum-based grease, as it can cause the urethane to swell or degrade over time. Instead, use a high-quality silicone-based or synthetic waterproof grease (often called "Super Lube" or "Moly-Grease"). Apply a generous coating to both the outside of the bushing before pressing it into the beam and the inside where the trailing arm makes contact. This ensures a silent operation and provides an extra layer of protection against moisture entering the beam assembly.

3. Verify the Removal of All Old Bearing Races

A common mistake during the transition from needle bearings to urethane bushings is leaving the old outer metal races inside the beam. The EMPI urethane bushings are designed to fit directly against the inner wall of the axle beam tube. If the old needle bearing shells are still pressed inside, the urethane bushings will not fit, or you will damage them trying to force them in. Use a long drift or a specialized bearing puller to ensure every piece of the original metal bearing assembly has been removed before you attempt to install this kit. Proper clearance is vital for a successful "set it and forget it" installation.