Installing a Nissan S15 Wing onto the S13 Chassis

Considerations When Putting an S15 Wing on an S13

The Nissan 240SX S13 and S15 models have become quite popular in tuning and modification circles. A common upgrade that many S13 owners choose is to install the bigger, more aggressive rear wing from the S15 onto their S13 hatchback or coupe. This can definitely give the S13 a nice performance look, but there are some important considerations to make before bolting on an S15 wing.

Structural Integrity

The S15 wing is bigger and positioned more rearward than the stock S13 wing. This shifts aerodynamic forces rearward, which can put more stress on the hatch/trunk area. It's important to structurally reinforce the hatch and rear chassis area to ensure the extra wing load does not cause issues or cracking over time. Some options are to weld support plates on the hatch interior or install chassis bracing bars/plates leading from the wing mounts back to the rear suspension towers.

Mounting Location

The S15 wing uses different mounting locations than the S13 wing, positioned further back and more towards the rear corners of the hatch. When installing an S15 wing, you'll need to drill new mounting holes and use the proper wing stands, plates, and hardware so that the wing can be securely bolted on. Getting the exact positioning right takes some careful measurement and test fitting. If the mounting location or angles are off, the wing can look awkward and will not provide ideal aerodynamic load.

Wiring & Lighting

The S15 wing often includes integrated 3rd brake lighting to comply with regulations in the Japanese market. These will need to be wired up to function properly on US/Western market S13s as well. This involves running wiring from the brake light circuit, through the hatch, up to connectors on the wing. Custom LED lighting can also be installed in the endplates to give a unique look at night.

Benefits of Adding an S15 Wing to an S13

Once properly installed, an S15 wing can provide both visual and performance benefits on an S13:

Aggressive Style

The S15 wing is much larger and more prominent than the subtle S13 wing. This gives the rear of the car a more aggressive, race-inspired look that many enthusiasts appreciate.

Aerodynamics

The bigger wing size and endplates provide more substantial aerodynamic effects at speed. This can improve high-speed stability and downforce for better grip and handling capability.

Customization

The wing offers a variety of customization options, from carbon fiber construction, to unique endplate designs, custom lighting, and color matching to the rest of the car.

Important Maintenance for Added Rear Wings

While the S15 wing can provide great visual and performance upgrades, it also requires some additional maintenance considerations to keep it in top shape:

Inspection & Tightening

The mounting hardware and standoffs should be periodically inspected for any loosening over time. The wing sees significant aerodynamic forces at speed, and loose mounting can severely compromise integrity.

Material Care

If the wing is fiberglass, carbon fiber, or other composite materials, proper cleaning techniques need to be used to avoid damage over long term use.

Crash Protection

Due to the wing's rearward position, a rear bumper guard bar should be considered if parking or traveling in congested areas where minor rear impacts could damage the wing.

With the right preparation and care, upgrading an S13 with the S15's signature wing can provide great performance, style, and opportunities for customization while maintaining safety and road legality.