Ultra 40 Plug Wire Set GM LT1 - Black

The MOROSO Ultra 40 Plug Wire Set for GM LT1 engines is a high-performance ignition system designed specifically for naturally aspirated and boosted LT-series applications requiring race-grade spark plug wire reliability. This eight-cylinder wire set features 8.65mm spiral-core construction with 90-degree plug boots and HEI/socket-style connectors, delivering consistent spark delivery across a broad RPM range for street, strip, and track environments.

The spiral-core design reduces electromagnetic interference while maintaining optimal voltage transfer to spark plugs under sustained high-RPM operation. The 8.65mm conductor diameter represents a critical specification for LT-series applications—thicker than standard street wiring, the larger core minimizes voltage drop and maintains spark integrity through extended acceleration runs. The 90-degree plug boots ensure proper fitment within tight engine bay configurations typical of modern LS and LT engine platforms, eliminating boot-to-header contact that compromises ignition performance. The black finish resists UV degradation and heat-induced wire deterioration common in under-hood environments.

This wire set is purpose-built for serious LT1 enthusiasts—engine builders, performance shops, and weekend racers who demand reliability when timing and consistency determine outcomes. Whether tuning a stock 5.7L LT1, upgrading a turbocharged application, or supporting competition-level builds, the MOROSO Ultra 40 addresses the ignition demands that factory wiring cannot sustain under sustained load or elevated boost conditions. Compatibility with GM GenV LT-series engines makes this kit essential for any significant ignition system upgrade.