Shock 9in IMCA Dry Kit 3 Port Linear / Digressive

The Shock 9in IMCA Dry Kit 3 Port Linear / Digressive (model 84-9-6P-D) is a purpose-built monotube shock absorber designed for IMCA-sanctioned short-track racing and dirt oval competition. This 9-inch stroke shock is engineered for racers who demand precise damping control across variable track conditions—from dry slick to rough, choppy surfaces. Whether you're competing in IMCA-legal classes or upgrading your race car's suspension geometry, this shock delivers the tuning flexibility and durability required for consistent lap times and driver confidence.

This monotube shock features a three-port linear/digressive valve design, which means it provides predictable resistance that transitions smoothly from softer initial response to firmer mid-stroke and high-speed compression. The digressive curve is critical in dirt racing—it absorbs initial bump impact without bottoming, then ramps resistance to control chassis roll and pitch during hard cornering and acceleration. Constructed from steel with a blue paint finish, the shock measures 3.25 inches in outer diameter and compresses to 14.95 inches while extending to 23.85 inches, giving it 9 inches of usable travel. At 3.73 lbs, it's a lightweight suspension component that won't compromise your car's mass distribution or handling balance.

This shock is best suited for drivers competing in IMCA-approved racing series, including modified, street stock, and hobby stock classes where suspension geometry and damping tuning directly impact competitiveness. The dry-kit design (without external remote reservoirs) keeps installation straightforward and cost-effective while maintaining the performance needed for weekly racing. Pair this shock with complementary springs and bars to dial in your car's anti-squat, anti-dive, and roll characteristics. Installation requires proper spring rates, mounting angles, and preload setup—work with your chassis builder or suspension specialist to ensure optimal ride height, compression, and rebound tuning for your specific track and driving style.