RodderMods

Chassis stiffening

1986–92 Toyota Supra Mk III (A70) chassis stiffening

2 kits to stiffen the body shell, from frame rails and connectors to braces and roll bars.

How it's built
Steel unibody
Weak spots
Rust shows up in the rear wheel arches, rocker panels, lower doors and around the targa roof seals. Lower ball joints are a known failure point, and the rubber subframe, differential and arm bushings are usually tired.

Stiffening kits

Prices checked Oct 14, 2026

AreaKitWhat it isPrice
Shock & strut tower braces Cusco (sold by Lethal Performance) Cusco Strut Tower Brace, Rear, Type-AS (163 511 A) Rear brace for 1987-92 MA70. $162 Price from page product metadata Source
Shock & strut tower braces Cusco (sold by Supra Store) Cusco Front Strut Tower Bar MK3 - NON TEMS (183540A) Fits non-TEMS and 89-92 small-actuator TEMS cars; not 86.5-88. $180 Sale price (list $255) 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.