ISR Performance Eccentric Lockout Kit - 95-98 Nissan 240sx

Stop Your S14 Rear Alignment From Wandering Mid-Corner and Lock It In for Good

The ISR Performance IS-EL-S14 Eccentric Lockout Kit is the definitive fix for factory eccentric bolt slippage on the 1995-1998 Nissan 240SX S14. The OEM rear suspension relies on eccentric bolts to set camber and toe, but those bolts are notorious for rotating under hard cornering loads and shifting your alignment away from where you set it. The IS-EL-S14 deletes those eccentric bolts entirely and replaces them with ISR's stainless steel lockout plates and Grade 10.9 hardware that physically prevents any rotational movement, so your rear alignment stays locked at your set angle through every hard corner, drift run, and track session. This is a mandatory upgrade for any S14 running adjustable rear control arms on a track or on a competitive course.

Key Features

• ISR Performance IS-EL-S14 eccentric lockout kit designed for the 1995-1998 Nissan 240SX S14 and S15 rear suspension
• Permanently deletes factory eccentric bolts that cause rear alignment shift under cornering loads
• Machined stainless steel lockout plates prevent any rotational movement at the rear suspension pickup points
• Grade 10.9 hardware supplied for maximum clamping force and zero-slip performance
• Requires adjustable rear control arms to set camber and toe after eccentric bolt deletion
• Direct bolt-on to factory S14 rear subframe mounting locations
• Compatible with both S14 and S15 chassis rear suspension geometry

Fitment

Specifications

What's Included

• ISR Performance IS-EL-S14 stainless steel eccentric lockout plates
• Grade 10.9 hardware set for installation

Frequently Asked Questions

The IS-EL-S14 deletes the factory eccentric bolts in the rear suspension of the 1995-1998 Nissan 240SX S14. These factory eccentric bolts are designed to allow camber and toe adjustment, but they tend to rotate under hard cornering loads and cause your rear alignment to shift away from its set position. The IS-EL-S14 replaces them with solid stainless steel lockout plates and Grade 10.9 hardware that physically cannot rotate, permanently locking your rear alignment in place.

Yes. The factory eccentric bolts provide the only method of adjusting rear camber and toe on the stock S14 rear suspension. Once the IS-EL-S14 deletes those eccentric bolts, you must have adjustable rear camber arms and toe arms installed to set and maintain your desired rear alignment. Without adjustable arms, you will lose the ability to correct rear camber and toe after installation.

Yes. ISR Performance confirms that the IS-EL-S14 is compatible with both the Nissan 240SX S14 (1995-1998) and S15 chassis rear suspension. Both platforms share the same rear subframe eccentric bolt locations and geometry, making the IS-EL-S14 a direct-fit solution for both generations.

ISR Performance notes that the IS-EL-S14 eccentric lockout kit is intended for competition vehicles. Deleting the factory eccentric bolts removes the OEM rear alignment adjustment mechanism, and this modification may not be street-legal in all jurisdictions, including California. Verify compliance with your local laws and regulations before installing on a street-driven vehicle.

Jam nuts added to factory eccentric bolts provide some resistance to rotation but are unreliable under sustained cornering loads because the factory eccentric bolt hardware is not designed for this use. The IS-EL-S14 machined stainless steel lockout plates and Grade 10.9 hardware create a physically rigid connection at the mounting point that eliminates any possibility of bolt rotation regardless of cornering load, providing a permanent and reliable solution where jam nuts only slow the slipping process.

If installed carefully with the lockout plates positioned to match your current eccentric bolt positions, minimal alignment change will occur. However, since the lockout plate positions must be set during installation, a professional four-wheel alignment is strongly recommended immediately after installing the IS-EL-S14 to verify and set rear camber and toe to your target specification using your adjustable rear control arms.

ISR Performance offers a full range of adjustable rear suspension arms for the S-chassis platform, including rear camber arms, toe control rods, and traction rods. Pairing the IS-EL-S14 with ISR adjustable rear camber arms and toe arms gives you complete control over rear geometry with the confidence that your settings will not shift under load once locked in with the IS-EL-S14 plates.

The IS-EL-S14 lockout plates are machined from stainless steel, which provides excellent corrosion resistance in the underbody environment of the S14. Stainless steel will not rust under normal use conditions and requires no additional protective coating for longevity on a track or street-prepped S14.

Yes. The IS-EL-S14 is designed to bolt directly into the factory rear subframe mounting locations on the 1995-1998 Nissan 240SX S14 without any subframe modification, drilling, or welding. The included Grade 10.9 hardware replaces the factory eccentric bolt hardware at the same mounting points.

Installation Instructions

1. Safely raise and support the S14 on jack stands at all four corners for full undercarriage access.
2. Note the current position of the factory eccentric bolts on both sides to serve as a reference for alignment during installation.
3. Support the rear knuckle with a floor jack to prevent suspension droop while the factory bolt is removed.
4. Remove the factory eccentric bolt on one side. Retain any OEM spacers for reference.
5. Position the ISR Performance IS-EL-S14 stainless steel lockout plate at the factory mounting location, oriented to match the reference position noted in Step 2.
6. Insert the supplied Grade 10.9 hardware through the lockout plate and mounting hole.
7. Hand-tighten the hardware and verify the lockout plate is correctly seated before final torquing.
8. Torque the Grade 10.9 hardware to specification with the suspension at ride height.
9. Repeat on the opposite side.
10. Schedule a professional four-wheel alignment immediately after installation using your adjustable rear control arms to set camber and toe to your target specification.

WARNING: This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.