Ultra Plug Wire Set GM LS 9.75 Long Red

The Ultra Plug Wire Set GM LS 9.75 Long Red from Moroso is an essential ignition upgrade for LS-platform engine builds and restorations. Whether you're running a stock crate motor or a heavily modified LS powerplant, quality spark plug wires directly impact combustion efficiency, throttle response, and overall drivability.

The 9.75-inch length specification makes these wires purpose-built for GM LS engines, eliminating the guesswork of universal fitment and ensuring optimal routing around modern engine bay layouts. Moroso's Ultra wire construction uses spiral-wound core technology with high-temperature silicone insulation, designed to withstand the heat cycling and electrical demands of high-output LS engines.

This wire set is ideal for LS engine swaps, full restorations, and performance upgrades where OEM spark plug wires have degraded or aftermarket routing demands precision fitment. The 9.75-inch length accommodates both traditional and tight engine bay configurations common in Chevrolet, Pontiac, and Cadillac platforms running LS blocks.