The all new Non-Adjustable Black X-Series has been designed based off of driver input and on-track performance. Through racing applications and in-house dyno evaluation, PRO® has developed the ultimate non-adjustable shock. Each PRO® Twin Tube Shock is carefully hand-built and dyno sheets are included with every shock. PRO® Shocks carries all of the popular valve combinations. The threaded finish shocks are targeted at Pavement and Dirt Late Model applications.
 
	
Upgraded shaft seals to protect shocks from dirt and debris.
	
Wear-resistant steel billet pistons for improved sealing and increased durability.
	
Dual bleed ports in body for more consistent builds.
	
High precision components for more consistent builds.
	
Optimized low speed control for the ultimate in driver feel.
	
Rebuildable and revalveable