Hardrace Complete Harden Bushing Kit – Nissan 240SX / Silvia S14 / S15

Hardrace Complete Harden Bushing Kit – Nissan 240SX / Silvia S14 / S15 (6742)

Product Overview

The legendary Nissan S-chassis multi-link suspension layout is celebrated for its incredible responsiveness and tuning potential. However, after decades of hard driving, track abuse, and environmental wear, the original factory rubber bushings rot, crack, and turn to mush. This deterioration allows your control arms to shift unpredictably under load, leading to dynamic alignment drift, rear end squirm, a vague steering wheel feel, and accelerated tire wear.

The Hardrace Complete Harden Bushing Kit (6742) is the ultimate bumper-to-bumper chassis restoration package for your street or track machinery. Available at JDMaster.net, this massive 26-piece master overhaul set completely replaces the soft, worn structural pivots across your entire front and rear suspension. Engineered with ultra-high-strength, anti-crack vulcanized rubber compound, this premium kit drops right into your factory arms to deliver a solid, highly predictable suspension response without the harsh, binding characteristics or squeaking commonly associated with polyurethane alternatives.

Key Features & Benefits

• 26-Piece Master Kit: A complete, comprehensive overhaul that replaces all primary suspension pivots across the front and rear control arms, links, and knuckles in one definitive package.

• High-Durometer Vulcanized Rubber: Fabricated from Hardrace’s proprietary high-strength, anti-crack hardened rubber compound that is significantly stiffer than brand-new OEM components.

• Locks Down Dynamic Alignment: Eliminates uninvited toe and camber variations during high-load cornering or aggressive drift transitions, providing relentless track predictability.

• Maintains Street Compliance: Unlike rigid polyurethane or solid metal bearings, these premium hardened rubber elements absorb high-frequency road vibrations and chassis NVH, making them great for high-performance daily drivers and weekend street/track setups.

• Zero Noise and Zero Maintenance: Requires absolutely no ongoing greasing or internal lubrication. These bushings operate silently, completely eliminating the annoying squeaks and groans associated with polyurethane inserts.

• Direct OEM Replacement Profile: Explicitly engineered to press directly into your factory Nissan structural arms, tension links, and rear hub knuckles for a perfect fit.

Technical Specifications

Applications

• Nissan Silvia / 200SX / 240SX (1995–1998 — S14 Kouki & Zenki Chassis)

• Nissan Silvia / 200SX (1999–2002 — S15 Spec-R & Spec-S Chassis)

• Infiniti Q45 (1997–2001 — 2nd Generation Y33 Chassis)

The Mechanical Advantage: Eliminating Multi-Link Deflection

The Nissan S14 and S15 rear multi-link suspension utilizes a trio of upper control arms (camber, traction, and toe links) combined with an A-shaped lower control arm. When you initiate a drift or accelerate hard out of a tight apex, these arms are subjected to immense simultaneous lateral and longitudinal compression loads. If your factory bushings are soft or deteriorated, the inner sleeves flex sideways. This physical bushing displacement causes the rear wheel to dynamically toe-out and drop camber, leading to a sudden loss of traction, a unpredictable breakaway point, and dynamic alignment drift.

The Hardrace 6742 master kit resolves this chassis deflection by utilizing high-hardness rubber matrices that resist twisting forces under immense racing loads. Because the rubber compound is securely vulcanized to its steel inner and outer sleeves, the arm moves smoothly through its intended vertical travel arc without mechanical binding, while completely locking out side-to-side squirm. The result is instant mechanical communication, maximum tire contact patch utilization, and a highly predictable rear-end slip angle.

Professional Workshop Press Installation Notes

Technical Fitting Note: This master package is an intensive, unpressed service kit. Installation requires removing your vehicle’s factory front and rear arms and utilizing a heavy-duty hydraulic workshop press along with appropriate receiving cups to extract the old casings and seat the new bushings safely.

To guarantee maximum bushing operating life and avoid rubber tearing, the final torque sequence for every suspension arm pivot bolt must be executed strictly while the vehicle is resting under its own full weight at natural ride height on an alignment rack or drive-on lift. Securing the bolts while the suspension hangs in the air will permanently twist the internal rubber matrix once dropped, leading to premature splitting and an uneven ride height index.

For flawless execution, you can book a complete installation and setup session at our fully equipped JDMaster.net workshop, where our technicians specialize in high-precision press work, arm indexing, and custom track-oriented laser geometry tracking.

Warranty

The warranty on Hardrace products depends on the type of product, with a minimum warranty period of 2 years. This warranty does not cover damage caused by a car crash, improper use, negligence or normal wear and tear.