QA1 9057-312 35MM Piston Large Body Circle Track Shock

35MM Piston, Large Body Circle Track Shock These pistons have flat linear compression and digressive rebound with up to 0.056" of preload to generate low-speed control without excessive high-speed forace, helping you maintain grip over surface irregularities. Used on both dirt and asphalt cars, these pistons can generate the force numbers you're looking for to keep the left rear up or keep the front end sealed off. The amount of shim stack preload, shim thickness, and diameter are all able to be tuned to tailer the force curve of the shock. QA1 offers a variety of replacement & service parts to keep you on the road or track Keep your car performing at it's best Top notch tech support always ready to help