If you want serious performance, handling, and traction when you're at the dragstrip, AutoX, or road racing; then you need a Spohn Performance fully adjustable torque arm, here's what it'll do:

• Attaches to the rear axle and controls rear end torque during acceleration, transferring this energy into the tires, increasing straight line traction
• Reduces nose-dive during braking
• Eliminates wheelhop
• Increases sidebite during corner exit acceleration
• Entire package is a complete bolt-in assembly using existing mounting points on the vehicle. No drilling or welding is required!
• No fabrication, welding or drilling required - 100% bolt-in installation!
• Removes the torque arm pivot point from the rear of the transmission to the Spohn crossmember
• Changes the instantaneous center and leverage point from stock
• Provides adjustable pinion angle
• FREE angle finder included to set pinion angle

Build Specifications:

• Constructed of 1.25" o.d. x .120" wall DOM tubing
• TIG welded 4130N chrome moly threaded tube adapters
• Heavy-duty 3/8" thick laser cut steel rear housing mounting bracket
• Polyurethane bushing front mount version for minimal road noise. Integral grease fitting allows for lubrication of the fluted polyurethane bushing
• Rod ended front mount version utilizes an extra high strength chrome moly spherical rod end with TeflonŽ self lubricating race for those who demand the best in bind-free performance and strength
• Del-Sphere front mount version utilizes an extra high strength chrome moly Del-Sphere pivot joint for those who demand no bushing deflection and the best in street-friendly bind-free performance and strength
• Rear of torque arm mounts to the 3/8" thick steel rear housing mounting plates via two 3/4"-16 NFT x 5/8" bore x 7/8" thick solid steel rod ends.
• Integral 4140 chrome moly pinion angle adjuster between the bottom rear solid rod end and the bottom rear torque arm tube allows for easy pinion angle adjustment. A simple turn of the wrench will give you over 6 degrees of pinion angle adjustment, it's that simple.
• Available powder coated in your choice of the above colors
• This is a proven product being run on some of the fastest F-Bodies in the country!
• Rear mounting bracket is designed to fit on the OEM and/or aftermarket rear ends
  

4130N Upgrade: The ultimate in bullet-proof lightweight strength, 100% TIG welded chrome moly construction! Same as above, but torque arm is constructed entirely from 1.25" x .095" 4130N chrome moly tubing.