Upgrade current spark plug wires to these low resistance, high performance 8mm silicone wire sets with eight pre-terminated spark plug boots. Due to varying exhaust manifold and header styles, ignition wires must be cut to length and terminals must be crimped with an ignition wire crimp tool; sold separately. Choose the application based on the spark plug boot configuration (straight, 45° or 90°) that will work best for your truck. Distributor end terminals, boots and detailed instructions are included. Call or go online and order yours today!