Torsion Bar Set - '65-'86 Porsche 911/912 and 1955-1959 VW Bug (1129/Solid)
SKU 1129
Category: Porsche & Volkswagen Torsion Bars High-performance 29mm solid rear torsion bars by Sway-A-Way, precision-engineered to provide extreme roll stiffness. These bars are designed for high-horsepower competition Porsche 911/930 builds and heavy-duty vintage VW projects where maximum anti-squat and lateral stability are required.
Performance & Fitment
Application: Rear Torsion Bar Set Length: 24 11/16” Diameter: 29mm (Extreme Competition Upgrade)
Porsche 911 / 912 / 930: 1965 through 1986
Volkswagen Beetle (Swing Axle): 1955 through 1959
Premium Construction
Material: Solid aircraft-grade alloy steel for ultimate torsional strength and load-bearing capacity
Manufacturing: Centerless ground to ensure a perfectly linear spring rate and eliminate surface stress risers
Heat Treatment: Through-hardened and shot-peened to resist extreme fatigue and prevent "settling" or sagging
Finish: Industrial-grade powder coating for maximum protection against corrosion and road debris
⚠️ Critical Fitment Exceptions
Even if your car falls into the year ranges above, you must ensure it does not fall under these exceptions:
❌ G50 Transmission Porsche 911: This SKU is incompatible with 1987–1989 Porsche 911 models. Those vehicles utilize significantly longer torsion bars (~26") and different spline counts specific to the G50 transaxle.
❌ Post-1959 VW Beetle: These are the "short" 24 11/16" bars. They will not fit 1960–1968 Swing Axle models (26 11/16" bars) or 1969+ IRS models (21 3/4" bars).
❌ Race-Only Stiffness Warning: A 29mm bar is over 200% stiffer than a factory 22mm bar. This results in an incredibly rigid ride quality. It is strictly recommended for dedicated track, drag racing, or heavy-duty competition use; street use may cause excessive chassis stress without reinforced mounting points and specialized damping.
What’s Included
One pair (2) of 29mm extreme-duty solid rear torsion bars
Warranty
Backed by a 1-year warranty for peace of mind.