DEI Protect-A-BootTM Spark Plug Boot Heat Shields Protect your Spark plug boots from the extreme heat generated by the headers or exhaust manifold. Made from a fiberglass composite material they will not cause arching like some metal shields on the market. If wires are touching exhaust we recommend wrapping the header with exhaust wrap in the problem area in addition to the Protect-A-BootsTM. Features: * Installs in seconds * Fits most boots straight or angled * Protects to 1200 degrees direct continuous heat * Available in four vivid colors