Ultra 40 Plug Wire Set - LS1- Unsleeved

The MOROSO Ultra 40 Plug Wire Set for LS1 engines is designed for builders and enthusiasts who demand reliable ignition performance on Gen III/IV small-block platforms. This unsleeved configuration allows for clean, direct spark delivery, making it ideal for tight engine bays or custom installations where space is at a premium.

The Ultra 40 designation indicates a resistance of 40 ohms per foot, which helps suppress RF interference while ensuring signal integrity to the spark plugs. The unsleeved design minimizes heat buildup around the wires, providing cooler operating temperatures—especially beneficial for turbocharged or supercharged LS builds. The cut-to-fit construction allows for precise routing and length adjustments, preventing excess wire from contacting hot surfaces or moving parts.

This plug wire set is specifically designed for LS1 engines, compatible with vehicles from 1997–2004 including Chevrolet Corvettes, Camaros, and F-bodies, as well as standalone LS1 crate engine swaps into older platforms. The unsleeved format is particularly appealing to engine bay builders who prioritize aesthetics and performance.