QA1 27A684-5M 27 Series Stock Mount Monotube Shock Absorber IMCA Sealed T-Bar/Poly

The QA1 27A684-5M is a stock mount monotube shock absorber from QA1's 27A Series, designed for circle track racing applications requiring IMCA-legal sealed construction. Built on the same proven platform as QA1's trusted 26 Series, the 27A Series adds a stock mount configuration and sealed Hyperscrew valving, making it legal for IMCA Southern Sport Mod and other classes that mandate a stock mount shock.

Key Features:

• Monotube steel body construction with zinc plating for enhanced corrosion resistance
• 46mm hard anodized piston for durability and consistent damping performance
• Sealed Hyperscrew valving (27A Series) — IMCA Southern Sport Mod legal
• 4-5M valving with linear damping curve for predictable, controllable suspension response
• T-bar top mount / polyurethane bushing bottom mount configuration
• Compressed height: 13.35 in. | Extended height: 22.55 in.
• Linear valving provides a stable, communicative feel so drivers can sense what the chassis is doing
• Damping curve controls suspension at low shaft speeds without generating excessive force at high shaft velocities
• 100% dyno tested and serialized for quality assurance
• Made in the USA at QA1's Lakeville, MN facility

The 27A Series is a popular choice for street stocks, hobby stocks, mini stocks, and other circle track classes requiring a stock mount shock. With sealed Hyperscrew technology and multiple valving options available across the 27A lineup, these shocks deliver race-proven performance within strict rule packages.