QA1 27683-4M 27 Series Monotube Stock Mount Shock Absorber Linear Hyperscrew

The QA1 27683-4M is part of QA1's 27 Series — a stock mount monotube shock absorber built for circle track racing applications including street stocks, hobby stocks, mini stocks, and other classes requiring a stock mount shock. Engineered to deliver the same proven performance as the QA1 26 Series, the 27 Series adds a convenient stock mount configuration with multiple valving options to suit a wide range of track conditions.

Key Features:

• Monotube design with zinc-plated steel body for excellent corrosion resistance
• 46mm hard anodized piston for durability and consistent performance
• Linear valving — provides a more stable car and allows the driver to better feel the chassis
• Hyperscrew adjustability for on-the-fly damping tuning
• Damping curve engineered for complete suspension control at low shaft speeds without generating extreme forces at high shaft velocities
• Racer revalveable and rebuildable for long-term serviceability
• 100% dyno tested and serialized for unparalleled consistency and repeatability
• Upper mount: T-Bar | Lower mount: Polyurethane bushing
• Extended length: 22.55 in. | Collapsed length: 13.35 in.
• Made in the USA

The 27683-4M features a 3-compression / 4-rebound (3C/4R) linear valving configuration, making it a well-balanced choice for racers who want predictable, consistent handling. Whether you're dialing in for a short track or fine-tuning your setup between heat races, this shock delivers the adjustability and reliability QA1 is known for.