Black Sleeving Plug/Ign Wire High Temp 3/8inx25

The Black Sleeving Plug/Ign Wire High Temp 3/8inx25 from THERMO-TEC is a heat-resistant insulation sleeve designed to protect ignition wires and spark plug boots in high-temperature engine compartments. Built for serious engine builders, hot rod enthusiasts, and mechanics working on high-performance builds, this product shields vulnerable wiring from radiant heat that can degrade insulation, crack boots, and cause misfires or electrical failures.

This sleeving features a 3/8-inch inner diameter and comes in a 25-foot roll, offering flexible coverage for multiple ignition wires or spot protection of high-exposure areas. The black material is rated for high-temperature environments typical of engine bays with headers, turbochargers, or superchargers—applications where undershielded wires can soften, blister, or fail under sustained heat exposure. The flexible, woven construction allows easy installation without removing wires from the vehicle, and the sleeve simply slides over existing ignition components for quick fitment.

THERMO-TEC's proven thermal protection formula reduces heat transfer to sensitive electrical connections, extending their service life and preventing costly mid-event electrical gremlins. This product is ideal for custom engine builds and forced-induction setups, ensuring that ignition components remain protected in high-performance applications.