Spohn 1993-2002 Camaro & Firebird Tubular Adjustable Torque Arm - Long Tube Headers/Y-Pipe 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. The Part # 405 adjustable torque arm provides a tunnel brace that is designed to clear long tube headers and y-pipe set-ups.