Ultra 40 Plug Wire Set For 68470 and 68472

The Ultra 40 Plug Wire Set For 68470 and 68472 is a premium ignition system upgrade engineered for GM LS-series engine platforms and HEI distributor applications. Built by MOROSO—a trusted name in high-performance ignition technology—this seven-piece wire kit addresses a critical need for enthusiasts and mechanics rebuilding or upgrading fuel-injected and carbureted LS powerplants. Reliable spark delivery across all cylinders is the foundation of consistent horsepower, throttle response, and engine longevity, making quality plug wires a non-negotiable component in any serious drivetrain refresh.

The Ultra 40 features MOROSO's proven spiral-core wire construction with a 7 mm diameter, engineered to minimize electromagnetic interference while delivering maximum voltage without voltage drop across the full engine RPM range. The 90-degree plug boots provide clean clearance in tight engine compartments and reduce boot-to-block contact that can degrade seals and cause misfires over time. These wires terminate in HEI/socket-style connectors, ensuring a precision fit to OEM and popular aftermarket HEI distributor caps and coil packs commonly used in LS conversions, restorations, and performance builds.

Street mechanics and engine builders benefit most from the Ultra 40 Plug Wire Set when tuning carbureted or EFI LS engines destined for street cars, trucks, or light competition duty. The black jacket resists UV degradation and engine bay heat, maintaining conductor integrity through countless heat cycles. Installation is straightforward on distributor-equipped LS platforms—route wires away from hot exhaust manifolds and sharp edges, seat boots firmly until you hear the click, and confirm all spark plugs fire cleanly on initial startup. Verify compatibility with your specific 68470 or 68472 application before ordering to ensure OEM fitment and peak ignition performance.