3.5" - 4" Silicone Coupler Reducer

Pro-M Racing reinforced silicone couplers provide race-proven performance for high-temperature, high-boost applications! Constructed from hand-wrapped, 4-ply, high-grade silicone, these couplers feature superior temperature resistance rated for -65 degrees F to 350 degrees F. Pro-M Racing reinforced hose couplers are strong and reliable -- they won't swell or burst under extreme conditions.