PST Reveals Groundbreaking CATAPULT® Billet Aluminum Trailing Arms for GM Musclecars.

PST, a market leader in musclecar suspension systems, debuted today a breakthrough in trailing arm technology – the Catapult® Billet Aluminum Performance Trailing Arm System. Utilizing aerospace grade aluminum and cutting edge low friction Delrin® material, the PST arm offers a level of performance previously unattainable with bolt-on parts. The arms are specifically developed for the 1964-72 GM A-Body platform, which includes the Chevrolet Chevelle, Monte Carlo, and El Camino, the Buick Skylark, Special, and Gran Sport, the Oldsmobile 442, Cutlass, and F-85, and the Pontiac Tempest, Lemans, and GTO.

Stock lower trailing arms are flimsy and weak, leading to poor handling and excessive wheel hop. Most of the aftermarket offers conventional fabricated steel trailing arms with polyurethane bushings – a design that is very stiff, but does not allow for the axle to move freely throughout the range of motion. This can cause a bind in the rear suspension, leading to snap oversteer and unpredictable handling. PST’s Catapult® Billet Aluminum Trailing Arms solve this problem with an innovative solution that delivers smooth, consistent, predictable handling for a GM musclecar. Just as the same implies, Catapult® arms are designed to put maximum power to the ground to deliver ultimate performance off the line.

Starting with a solid block of 6061-T6 aerospace grade aluminum, a sleek superstructure is machined that yields an incredible strength-to-weight ratio. Each end is fitted with an Alu-Max® Pivot Joint – a low-friction spherical joint that allows for 30 degrees of articulation. The Alu-Max® Pivot Joint is comprised of two Delrin® races and a lightweight hard anodized, 7075-T6 aerospace grade aluminum spherical ball. The sway bar mounting holes allow for the installation of any stock or aftermarket sway bar that mounts in the factory location. A military spec black anodizing is applied to the entire superstructure and the arm is finished off with a white PST and Catapult® logo.

To compliment the lower trailing arms, PST developed a set of matching Catapult® Adjustable Upper Trailing Arms and Frame Reinforcement Braces. The upper trailing arms feature a bulletproof steel construction and a low-friction Alu-Max® Pivot Joint, and can even be adjusted on the vehicle to change the pinion angle - crucial to lowering 60 foot times, increasing traction, and reducing wheel hop. 

The Frame Reinforcement Braces triangulate the upper and lower trailing arm mounts for added strength and driving performance. These braces are pre-bent to contour to the floor of the vehicle, allowing for installation without modification.

A four and a half minute video was developed to document the design and manufacturing processes, illustrating the cosmetic and functional advantages of PST’s innovative new system. The video can be viewed on PST’s website or on

YouTube:

http://www.youtube.com/watch?v=Xk9EfPC-SKk

The CATAPULT® Billet Aluminum Trailing Arms are priced at $449. A complete package including the Lower Trailing Arms, Upper Trailing Arms, Reinforcement Braces, and High Strength Stainless Steel Hardware Kit is available for $849. In keeping with PST’s tradition, all products include free shipping to the 48 US States.

About PST

PST has been the leader in musclecar suspension since 1984. In addition to cutting edge high performance products, PST is best known for a complete line of Front End Rebuild Kits that save time and money by providing a complete, all-in-one package. PST’s world-famous POLYGRAPHITE® bushings feature near-zero deflection operation and the self-lubricating qualities of graphite to reduce noise. PST operates out of a 142,000 square foot facility in northern New Jersey. For more information on the full range of PST products, please visit www.p-s-t.com.