Pro Shock ASB637B Aluminum Small Body Threaded Twin-Tube Racing Shock with Bearings

The Pro Shock ASB637B is an aluminum small body threaded twin-tube racing shock absorber from the ASB Series, designed to deliver precise driver feel and reliable performance on the oval track. Featuring a 6-inch stroke, compression valving of 3, and rebound valving of 7, this shock is factory-built and dyno-tested to ensure consistent, true valving right out of the box.

The ASB Series is built around a 1-5/8" O.D. small body aluminum threaded housing, keeping weight low while providing the durability racers demand. The twin-tube design delivers a superior driver feel compared to mono-tube alternatives, helping drivers make confident, real-time suspension decisions at speed. This unit ships complete with bearings, a travel indicator, and a jam nut — everything needed for immediate installation.

Key Features:

• Aluminum small body threaded construction — 1-5/8" O.D.
• Twin-tube design for excellent driver feel and consistent damping
• 6-inch stroke with compression 3 / rebound 7 valving
• Includes bearings, travel indicator, and jam nut
• Serial-numbered dyno sheet included with every shock
• Non-adjustable, fixed-valve design ideal for budget-conscious racers
• Ideal for midget, mini sprint, mini cup, and micro class applications running coil springs
• Built and backed by Pro Shocks, a division of AFCO Performance Group

The Pro Shock ASB637B is a proven choice for open-wheel and small-displacement oval track racing classes. Each shock is carefully assembled to strict tolerances and verified on the dyno before shipping, giving racers confidence that performance matches the spec sheet every time.