Exclusively at Speedway Motors you can now order your custom Bilstein shocks online! Shock of choice for Wissota and UMP racers. Linear valving. Nickel plated for rapid heat dissipation. World class performance at a SN (Saturday Night) price. Bilstein s famous consistent fade-free performance. 46mm (1.81 ) diameter steel body. Steel Cap with Schrader Valve. 7 or 9 Stroke. Designed for but not limited to: Modifieds Late Models and Sprint Cars. Choose: Length - 7 or 9 Compression Valving - 0.5-10 (.5 increments) Rebound Valving - 0.5-10 (.5 increments) Bleed - Soft or Mid. Note: This shock is custom valved and assembled by our expert staff. Due to its custom nature it cannot be returned for a refund.