AFCO aluminum Monotube, fixed valve late model shocks. Threaded body for ease of installing coil-over springs. This gas pressure shock allows racer to change pressure to his/her preference. Owner-serviceable with custom valving available. Uses coil-over kit # 20135. • 21 Series: (5/8" shaft) for greater rod pressure gain. • Fixed valving in a gas pressure design. • User serviceable/repairable. • Custom valving available. • Coil-over kit (#20135) sold separately. • 7” – Compress Length = 13.53” Extended Length = 20.47” • 9” – Compress Length = 15.53” Extended Length = 24.47”