1989–98 Nissan 240SX (S13 & S14) chassis stiffening
3 kits to stiffen the body shell, from frame rails and connectors to braces and roll bars.
- How it's built
- Steel unibody
- Weak spots
- Rear wheel arches, rocker panels and strut towers rust, and many cars have damaged or crushed frame rails from jacking and drifting. Subframe and differential bushings are soft and worn, which causes wheel hop and rear steer.
Stiffening kits
| Area | Kit | What it is | Price |
|---|---|---|---|
| Shock & strut tower braces | Cusco (sold by LOJ Kits) Cusco Strut Tower Brace Front OS-Type S13 240SX | Aluminum front strut bar for 1989-94 S13. | $199.95 Listed price; page showed out of stock Source |
| Floor & rocker reinforcement | Cusco (sold by Envision Tuning) Cusco Front Tension Rod Brace S13/S14/S15 (CUS220 485 A) | Lower front brace tying both tension rod mounts, preload-adjustable. | $108 Sale price (was $120) Source |
| Seam & weld-in plates | Hardrace Rear Sub Frame Support Bar, 240SX S13/S14/S15 (6276) | Steel bar tying both rear toe-arm mounts on the subframe. | $118.92 Listed price on Hardrace USA Source |
Prices are from the linked seller pages and change often. Confirm fitment for your exact year and body style before ordering; many weld-in parts need professional installation. Some links earn us a commission.
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