These wires are the same ones used by many NASCAR Cup teams and other professional racing circuits including ASA and Daytona Prototype LSX engines. Made locally for us in Race City USA. Stainless steel spark plug terminals connect to wire-wound suppression cores, all wrapped in a 10mm high-temp silicone/fiberglass sleeve (rated at 30 Ohms per foot). 45 degree spark plug boots, 90 degree boots at the coils. The perfect length and angles to provide excellent clearance around headers.
These wires are a little more difficult to install than others but they are built to last in extreme conditions. We recommend not using Die-electric grease to install. Instead use dry lithium or dry silicone lube. Install by the wire not the boot. Available with or without insulating fire sleeves. Call for custom applications & lengths.