Goodmark Trunk Torque Rod

Goodmark Trunk Torque Rods: Restoring the Finishing Touch on Your Classic

When you're deep into a classic car restoration, it's easy to focus on the big-ticket items — the sheet metal, the engine, the chrome — and overlook the small mechanical components that keep everything functioning as the factory intended. The trunk torque rod (also called a trunk hinge torsion bar) is one of those easy-to-miss pieces. It's the coiled or formed steel rod that tensions the trunk lid hinge, allowing the lid to open smoothly and stay up on its own without a prop rod. On aging muscle cars and classic pony cars, these rods fatigue, kink, or corrode over time, leaving a trunk lid that flops open hard or refuses to stay up — a telltale sign of a restoration that isn't quite finished.

Goodmark Industries has been addressing exactly these kinds of overlooked restoration needs since 1991, when the brand was founded by car enthusiasts who recognized the need for quality restoration parts to keep the restoration of beloved American classics going . Today, Goodmark is the largest supplier of sheet metal parts in the GM Restoration Parts Program , and that commitment to factory-correct fitment extends beyond large body panels to precision hardware like trunk torque rods.

What Goodmark Offers in the Trunk Torque Rod Category

Goodmark's trunk torque rod lineup is purpose-built for iconic first- and second-generation GM pony cars. The two core SKUs cover the 1967–1969 Chevrolet Camaro and Pontiac Firebird platform, with separate fitments depending on whether the vehicle was equipped with a rear spoiler or not — an important distinction, as spoiler-equipped cars used a slightly different trunk lid geometry. These trunk hinge torsion bars are sold as a pair, with part numbers GMK-4020704672P (for models with a rear spoiler) and GMK-4020704672AP (for models without a rear spoiler) .

Goodmark's trunk torque rods are manufactured from steel and sold as a pair, specifically designed for models without a rear spoiler in that classic Camaro/Firebird application . Goodmark uses CAD/CAM software and modern tooling to create parts that are identical to factory original for perfect fit and finish , which matters enormously when you're trying to replicate the smooth, controlled trunk action of a showroom-new 1969 Camaro.

Why Goodmark Is a Trusted Name for This Application

Goodmark Industries offers a wide range of restoration parts that are equal in quality to original equipment, so buyers can be confident that Goodmark auto parts will fit and appear just like the OEM ones . For trunk torque rods specifically, that OEM-equivalent standard is critical — an incorrectly tensioned or poorly formed torsion bar won't hold the trunk lid at the right angle or provide the correct resistance during opening and closing.

Material quality from Goodmark remains strong, with most parts constructed from heavy-gauge steel and finished with corrosion-resistant coatings . On a part like a trunk torque rod that lives in a semi-exposed environment and is subject to repeated flexing every time the trunk is opened, that corrosion resistance translates directly to long-term reliability. Goodmark is one of the premier classic car sheet metal manufacturers, capable of providing nearly all body parts for numerous makes and models while maintaining high quality and precise fitment .

Whether you're completing a numbers-matching show restoration or simply making your daily-driven classic more livable, replacing worn trunk torsion bars is one of the most satisfying finishing steps in any build. Browse the full Trunk Torque Rod category or explore everything Goodmark has to offer across their extensive restoration parts lineup.