Race inspired valving for maximum weight transfer and bounce control (BNC) Coil-over design for ride height adjustments and precise chassis adjustment. Allows for "lowered stance"/ride height appearance (caster camber plates recommended) Note: AFCO recommends a 10" 200 lb. spring for drag racing, or a 14" 125 lb. spring for other uses. Item Details(1) Required Per Strut Coil Springs Sold Separately (2-5/8" ID).