Piston 46mm 6 Port Linear / Digressive

The AFCO Racing Products 46mm 6 Port Linear/Digressive Shock Piston (SKU: AFC550000934) is a precision-engineered suspension component designed for vehicles requiring advanced damping control and adjustability. Built for high-performance street and track applications, this aluminum piston delivers the responsiveness demanded by serious automotive enthusiasts and professional tuners who need fine-tuned suspension geometry. Whether you're optimizing a road-racing setup, autocross platform, or street-driven performance vehicle, this piston addresses the critical need for progressive damping characteristics that adapt to both low-speed and high-speed suspension movement.

Constructed from blue anodized aluminum, the 46mm piston features six ports configured in a linear/digressive valve design that fundamentally changes how your shock absorber behaves across the suspension travel spectrum. The linear portion handles initial shaft movement with consistent resistance, while the digressive section progressively increases damping force at higher velocities—mimicking the behavior of a variable orifice without moving parts. This dual-mode architecture prevents harshness during small bumps while maintaining control during aggressive cornering, hard braking, or track abuse. The compact dimensions (2.35 x 1.2 x 4.5 inches, weighing just 0.06 lbs) ensure direct compatibility with AFCO racing shocks and similar coilover platforms engineered for this bore diameter.

Performance tuners, race engineers, and suspension specialists rely on the 46mm 6 Port Linear/Digressive piston when building or refreshing shock systems for formula cars, sports sedans, and competition vehicles where suspension precision directly impacts lap times and driver feedback. Installation requires draining the shock fluid, removing the old piston assembly, and pressing the new unit onto the shock shaft—a straightforward procedure for experienced mechanics with proper tools. Verify your existing shock is engineered for AFCO linear/digressive pistons and confirm the 46mm bore diameter before ordering. This piston is sold individually; complete shock rebuild kits or matched pairs should be sourced separately based on your vehicle's setup requirements.