QA1 27A684-6M 27A Series Monotube Shock Absorber Large Steel T-Bar/Poly 4-6M IMCA Sealed

The QA1 27A684-6M is a stock mount monotube shock absorber from QA1's 27A Series, designed for circle track racing applications requiring IMCA-legal sealed Hyperscrew configuration. Built as an evolution of QA1's proven 26 Series, the 27A Series delivers the same trusted performance in a stock mount package — making it a go-to choice for street stocks, hobby stocks, mini stocks, and other classes mandating stock mount shocks.

Key Features:

• IMCA Legal: Sealed Hyperscrew design is IMCA and Southern Sport Mod legal
• 46mm Hard Anodized Piston: Large-diameter piston delivers rock-solid control and consistency
• Zinc Plated Steel Body: Corrosion-resistant finish for long service life
• Linear Valving (4-6M): Provides a stable, predictable damping curve for improved driver feel
• T-Bar Top / Poly V Bottom Mounts: Stock mount configuration for direct fitment
• Compressed Height: 13.35 inches | Extended Height: 22.55 inches
• 100% Dyno Tested & Serialized: Every unit verified for consistent, repeatable performance
• Made in the USA: Manufactured in Lakeville, MN

The 27A Series damping curve is engineered to maintain complete suspension control at low shaft speeds without generating excessive forces at high shaft velocities. This linear valving approach promotes a more stable race car and gives drivers superior feedback through the wheel. The sealed Hyperscrew design of the 27A Series distinguishes it from the standard 27 Series and ensures compliance with IMCA sanctioning rules.