Ultra 40 Plug Wire Set - LS1- Unsleeved

The MOROSO Ultra 40 Plug Wire Set for LS1 engines is a cut-to-fit ignition wire kit designed specifically for GM LS-Series applications. This unsleeved wire set delivers reliable spark delivery with a 7mm spiral-core construction that minimizes electromagnetic interference—critical for maintaining clean ignition timing in high-performance and stock LS1 builds alike. The 48-inch wire length provides the flex needed for factory-style installation without custom routing, while factory-style boots and terminals ensure direct compatibility with OEM distributor caps and spark plug connections.

Spiral-core wire construction resists signal degradation better than conventional solid-core designs, particularly important in LS1 engines where precise ignition timing affects both fuel efficiency and peak power delivery. The 7mm diameter is the industry standard for LS-Series engines, ensuring proper fitment and heat dissipation under sustained operation. Blue color coding aids in quick visual identification during maintenance or tuning work. The cut-to-fit design allows technicians to trim individual wires to exact engine bay requirements, eliminating excess slack that could contact hot surfaces or moving components.

This wire set is engineered for LS1-powered vehicles—from restomod Camaros and Corvettes to engine-swapped chassis—whether running stock or mild performance modifications. Builders restoring OEM ignition integrity after engine work, tuners upgrading from worn factory wires, or enthusiasts performing preventative maintenance on high-mileage LS1s will find this kit addresses the need for reliable spark delivery without over-specifying for the application. The unsleeved construction keeps costs competitive while the MOROSO brand reputation in engine component manufacturing ensures consistent quality across the set.