Mallory Pro Wires have an 8mm, red silicon jacket that are capable of withstanding temperatures up to 550°F and look great doing it. A spiral wound alloy core provides low resistance ensuring high energy transfer to the spark plugs while great noise suppression keeps noise interference out of on-board electronics. Mallory Pro Wires are a perfect fit for your street rod, hot rod or daily driver. Features: 8mm red silicon jacket withstands temperatures up to 550°F Available for popular Ford, Chevy and Chrysler applications Direct fit, no cutting or splicing required Spiral round NiCR Alloy core provides low resistance and high noise suppression Red spark plug wire with Black plug boots