QA1 Shock Piston - Linear/Digressive - Twintube Style - Gray HSCHD11SASM61 4L60 / 4L80

4L60 / 4L80

dual sight windows

139 Tooth Flywheel

Red and Blue

1975-1990 Ford E-150 Econoline

QA1 Shock Piston - Linear/Digressive - Twintube Style - Gray HSCHD11SASM61 4L60 / 4L80These 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