The K-Tech Pro-Valve (ORVS) for rear shock absorbers is engineered to deliver smoother, more controlled suspension performance. Featuring a high-flow, four-port piston design, it effectively reduces harshness while improving damping stability across demanding riding conditions. Designed for both two-stroke and four-stroke applications, the Pro-Valve (ORVS) comes pre-configured with a versatile shim stack setting, ensuring optimal performance for a wide range of rider skill levels. Additionally, a low-friction piston band minimises internal resistance, enhancing shock response and consistency—perfect for aggressive riding and competitive racing. As with all K-Tech high-performance products, we recommend professional installation by a qualified suspension technician using K-Tech's specialised tools for best results.