TORSION BAR SET, PORSCHE 911, 21 mm RATE

SKU 1821T 

Category: Porsche Torsion Bars

The performance-oriented front suspension upgrade for the air-cooled Porsche 911. These 21mm torsion bars represent a significant step up in stiffness from the factory units, specifically engineered to maintain a consistent spring rate even under high-load conditions. The "T" designation signifies a performance-optimized variant, making these ideal for "Fast Road" enthusiasts, rally-style builds, or drivers who frequently transition between street and track environments.

Performance & Fitment

Application: Front Torsion Bar Set Diameter: 21mm (High-Performance Upgrade) Spring Rate: Significantly stiffer than OEM (Approx. 45-50% increase over 19mm)

• Porsche 911: 1965 through 1989

• Porsche 912: 1965 through 1969

• Porsche 930 (Turbo): 1975 through 1989

• Note: Excellent for performance applications where maintaining front-end geometry is critical during aggressive cornering or high-speed maneuvers.

Premium Construction

• Material: Solid 4340 aircraft-grade alloy steel, chosen for its extreme tensile strength and superior "torsional memory."

• Manufacturing: Centerless ground to a precise 21mm diameter to ensure a perfectly linear spring rate and remove surface micro-imperfections that can lead to stress cracks.

• Heat Treatment: Through-hardened and shot-peened to prevent "settling" and ensure the vehicle maintains its corner-balanced ride height over years of hard use.

• Finish: Industrial-grade powder coating for maximum resistance against road salt, moisture, and debris.

⚠️ Performance & Installation Notes

• System Balance: To prevent excessive understeer, 21mm front bars should generally be paired with upgraded rear torsion bars (typically 27mm or 28mm) to keep the 911’s handling neutral.

• Damping Requirements: Because the spring rate is significantly higher than stock, standard comfort-valved shocks may be overwhelmed. Performance-valved dampers (such as Bilstein B8 or similar) are highly recommended.

• Spline Care: Always clean the female splines in the A-arms and adjustment caps before installation. Use high-quality waterproof grease on the splines to prevent future seizing and ensure quiet operation.

What’s Included

• 1 Torsion Bar Set

Warranty

Backed by a 1-year warranty for peace of mind.

Availability: Available for Back Order