Swift Springs 045-163-080B Quarter Midget Barrel Coilover Spring 4.5in x 1.625in ID 80 lb/in

The Swift Springs 045-163-080B is a precision-engineered barrel-type coilover spring purpose-built for Quarter Midget racing applications. Measuring 4.5 inches in length with a 1.625-inch inner diameter and a 80 lb/in spring rate, this spring delivers the consistent, linear performance that competitive racers demand on both dirt and pavement tracks.

Key Features:

• Proprietary HS5.TW Alloy Steel Construction: Manufactured from Swift's proprietary HS5.TW high-tensile alloy steel, far superior to standard silicone chrome steel for fatigue resistance and long-term rate consistency
• Barrel-Type Design: The barrel profile eliminates spring deflection and bowing, preventing spring rate inconsistency and contact with the shock body that can damage adjusting perch threads
• Reduced Unsprung Weight: Fewer coils result in reduced unsprung mass, increasing available shock stroke and improving transient response
• Copper Powder Coat Finish: Color-coded copper powder coat finish for easy rate identification and corrosion resistance
• Unmatched Linearity: Barrel design delivers consistent rate linearity lap after lap, rated among the lightest springs in the industry for its class
• Precision-Ground Flat Ends: Ensures even seating on the spring perch for repeatable, accurate setup

Specifications:

• Part Number: 045-163-080B
• Spring Type: Coil-Over / Barrel Type
• Product Line: Quarter Midget (QM)
• Length: 4.5 in
• Inner Diameter: 1.625 in
• Spring Rate: 80 lb/in
• Material: HS5.TW Alloy Steel
• Finish: Copper Powder Coat
• Sold: Individually (Each)

Swift Springs coilover springs are trusted by professional and amateur racing teams worldwide, providing increased traction, smoother weight transfer, and the predictable, tunable feel that Quarter Midget racers rely on to gain a competitive edge.