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Firestone Coil-Rite replacement air helper spring is designed to fit inside existing coil springs and create a variable spring rate to level vehicles and improve braking and handling under load. Made from durable polyurethane, Coil-Rite allows air pressure adjustments to match varying cargo and road conditions, supports roughly 500–1,000 lbs per set depending on application, and operates across wide temperature ranges for long-term assistance.
Firestone Coil-Rite Replacement Air Helper Spring 5.50in Dia. x 5in Length (Type - D) (W237606005)
