AFCO 37 Series are twin tube, aluminum body, threaded double adjustable shocks. Special valve codes are available for this shock. Includes coil-over hardware. • Double adjustable shock with no external canister - fits many shock rules. • Twin Tube design for ultimate traction, when traction is at its worst. • Includes coil-over hardware kit. • Custom valving available. • 5” – Compress Length = 11.18” Extended Length = 16.10” • 6” – Compress Length = 12.18” Extended Length = 18.10” • 7” – Compress Length = 13.18” Extended Length = 20.10” • 8” – Compress Length = 14.18” Extended Length = 22.10” • 9” – Compress Length = 15.18” Extended Length = 24.10”