Ultra 40 Plug Wire Set Black w/Sleeves

The MOROSO Ultra 40 Plug Wire Set in Black with Sleeves (MPN 73848) is specifically designed for GM LS-Series engines, providing high-performance ignition solutions for those seeking precision spark timing and reliable fire. This plug wire kit is ideal for race and high-output applications, ensuring that users can achieve optimal performance in demanding conditions.

Featuring a 7mm diameter spiral core construction, this wire set minimizes electromagnetic interference while delivering consistent energy to each cylinder. The 45-degree plug boots and HEI/socket-style connectors are designed for secure, corrosion-resistant connections, capable of withstanding engine vibration and thermal cycling. The black finish with protective sleeves enhances durability against abrasion, oil degradation, and UV damage.

This wire set is particularly beneficial for LS engine swaps and street performance builds, where OEM wire durability may not suffice under sustained high RPM operation. The 45-degree boot angle is specifically designed to accommodate the tight spark plug spacing found on LS cylinder heads, ensuring compatibility without kinking or fouling adjacent components.