QA1 27A6810-4M 27 Series Monotube Stock Mount Shock Absorber T-Bar/Poly IMCA Sealed 10-4M

The QA1 27A6810-4M is a 27 Series stock mount monotube shock absorber built for circle track racing applications where IMCA compliance is required. Featuring a compressed height of 13.35 inches and an extended height of 22.55 inches, this shock is engineered for custom ride height setups with a T-bar upper mount and polyurethane lower mount configuration and 10-4M valving.

Key Features:

• Sealed Hyperscrew (27A Series) — IMCA and Southern Sport Mod legal; gas pressure is only adjustable by QA1 or QA1 Authorized Rebuilders per sanctioning body and track rules
• Zinc-plated steel monotube body for superior corrosion resistance on dirt and asphalt tracks
• 46mm hard anodized piston for maximum car control across all shaft velocities
• Linear valving (10-4M) — provides a more stable car and better driver feel by controlling suspension at low shaft speeds without generating extreme forces at high shaft velocities
• T-bar top / polyurethane bushing bottom mount configuration for stock-style installation
• Rebuildable and revalveable by QA1 and authorized service centers for long-term serviceability
• 100% dyno tested and serialized for consistent, verified performance
• Made in the USA at QA1's Lakeville, MN facility
• Bushings included

The 27A Series is a popular choice for street stocks, hobby stocks, mini stocks, and other classes that mandate a stock mount shock. The sealed Hyperscrew design ensures sanctioning body compliance while the large steel body and proven monotube construction deliver reliable, repeatable performance lap after lap.