Suitable for any LS1 through to LSA engine with factory mounted coils, these 9mm Pro 100 Series leads have OEM-grade coil boots and straight spark plug boots which can retain factory metal heat shields. ICE plug wires are manufactured using the highest quality low resistance spiral wound copper alloy core and stainless steel "Snap Lock" cap and plug fittings. Extreme temperature silicone insulation and boots are used. The ultimate 9mm Pro 100 Series wires are used in all ICE ignition kits and have an extremely low resistance of just 100 ohms per metre for maximum spark intensity and duration.9 mm Pro 100 Series plug wire sets feature: 9GM808 - Standard Length leads 9GM878 - Standard Length leads with 45° ends to allow extra clearance for aftermarket headers. Spiral wound copper alloy core with very low resistance of 100 ohms per metre (35 ohms per foot). Premium quality "Snap Lock" stainless steel distributor cap and spark plug fittings. Extreme temperature silicone wire insulation and boots available in black. Fully fitted and ready to install for each specific engine application.