QA1 27689-2M 27 Series Monotube Shock Absorber 13.35/22.55 T-Bar/Poly Large Steel Body

The QA1 27689-2M is part of QA1's 27 Series — a stock-mount monotube shock absorber built for performance street and racing applications. With a 13.35-inch collapsed length and 22.55-inch extended length, this large steel-body shock features a T-Bar/Polyurethane upper mount and a 9-compression / 2-rebound valving configuration for a firm, controlled ride tuned toward competition use.

Key Features:

• Monotube design — single-tube construction delivers superior heat dissipation and more consistent damping compared to twin-tube shocks
• Zinc-plated steel body — large-diameter housing for durability and corrosion resistance
• 46mm hard-anodized piston — precision-machined for consistent, long-lasting performance
• T-Bar / Polyurethane upper mount — stock-style fitment with improved bushing performance over OEM rubber
• 9-compression / 2-rebound valving (9-2M) — firm compression with softer rebound, ideal for circle track and performance driving applications
• Multiple valving options available — the 27 Series platform supports a wide range of compression and rebound combinations
• Stock mount design — installs in OEM shock locations without requiring additional modifications

QA1's 27 Series builds on the proven platform of their popular 26 Series, adding stock-mount compatibility for broader fitment across classic muscle cars, GM mid and full-size platforms, and circle track race cars. QA1 engineers high-quality performance suspension systems for muscle cars, classic trucks, and race cars — trusted by enthusiasts for superior handling, ride quality, and customization.