Ultra 40 Wire Set 8.5mm GM LS/LT 11.0 Black

The MOROSO Ultra 40 Wire Set 8.5mm GM LS/LT 11.0 Black is a premium spiral-core ignition wire system designed specifically for GM LS and LT engine platforms. This wire set is ideal for automotive enthusiasts and professional mechanics who require reliable spark delivery under high-RPM conditions. It is particularly suited for those building street engines, tuning weekend racers, or restoring classic vehicles with modern power.

Constructed with 8.5mm spiral-core technology, this wire set provides superior electromagnetic shielding to minimize cross-fire and radio frequency interference, ensuring precise ignition timing. The design is engineered to handle elevated temperatures and voltage demands typical of high-performance builds, including forced-induction and nitrous applications. The black jacket not only offers a clean OEM-style appearance but also provides UV and ozone resistance, enhancing durability in engine bays.

This wire set is pre-cut and terminated for LS/LT applications, making installation straightforward without the need for custom fabrication. It is compatible with LS1, LS3, LS7, LT1, and LT4 engine swaps, as well as factory GM applications that have modified fuel systems or ignition timing curves. Mechanics and tuners will appreciate the precise fitment, which minimizes installation errors and enhances overall engine performance.