Performance & Fitment

• Application: Front Torsion Bar Set Diameter: 21mm (Extreme Competition Grade) Type: Solid Spring Rate: Maximum stiffness (Approximately 4x the rate of factory 4-cylinder bars)

• • Porsche 914-4: 1970 through 1976

  • Porsche 914-6: 1970 through 1972

  • Note: This is an exceptionally rigid bar. It is designed as a direct-fit replacement for the factory front torsion bars but intended only for highly modified chassis.

Premium Construction

• • Material: Solid 4340 aircraft-grade alloy steel, through-hardened to withstand the intense torsional forces generated by a 21mm bar on a lightweight chassis.

  • Manufacturing: Centerless ground to a precision 21mm diameter, ensuring a perfectly linear spring rate and a flawless surface finish to prevent stress riser cracks.

  • Heat Treatment: Shot-peened and heat-treated to ensure the car maintains its corner-balanced ride height under the most grueling track conditions.

  • Finish: Industrial-grade powder coating for superior protection against the elements and track debris.

⚠️ Critical Performance & Setup Notes

• Chassis Reinforcement: A 21mm bar transfers immense loads to the chassis. It is mandatory to inspect and likely reinforce the front torsion bar mounting bulkheads and A-arm pivot points to prevent metal fatigue or tearing.

• Matched Rear Springs: To prevent uncontrollable understeer, you must use very high-rate rear coil springs. This bar is generally paired with rear springs in the 250–350 lb/in range, depending on vehicle weight and tire choice.

• Damping: This spring rate requires professional-grade, custom-valved dampers. Standard performance shocks will not have sufficient rebound control, leading to a dangerous "pogo" effect on uneven surfaces.

• Ride Quality: This setup will be extremely harsh on public roads. It is optimized for smooth track surfaces and maximum lateral grip. 

What’s Included

• (1) Pair of solid torsion bars

Warranty

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

1 in stock (can be backordered)