Ultra 40 Ignition Wire Black 100ft Spool

The Ultra 40 Ignition Wire Black 100ft Spool from MOROSO delivers reliable spark delivery for high-performance engine builds and restoration projects where OEM wiring falls short. Whether you're rebuilding a classic muscle car, upgrading a street rod, or fine-tuning a race engine, quality ignition wire is non-negotiable—it directly impacts combustion efficiency, engine response, and overall reliability. This 100-foot spool provides the flexibility to run custom wire routing tailored to your specific engine bay layout, eliminating the guesswork of pre-cut harnesses.

MOROSO's Ultra 40 wire features advanced insulation and core construction designed to suppress radio frequency interference while maintaining consistent electrical resistance across the entire length. The black jacket resists UV degradation and heat damage, critical in tight engine compartments where wire routing near exhaust manifolds or turbo plumbing is unavoidable. At 6.42 lbs per spool and compact dimensions (7.8 x 7.55 x 8.1 inches), the wire is easy to store and handle, making fabrication and installation efficient for both professional shops and hands-on enthusiasts.

Mechanics and engine builders choose bulk ignition wire spools when standard pre-assembled harnesses don't fit their custom configurations—carbureted platforms, forced-induction conversions, or vehicles with non-standard plug placement all benefit from this flexibility. The 100-foot length accommodates multiple cylinders and long runs without joints, reducing potential failure points and ensuring uniform spark timing from coil to plug. Installation requires quality terminals and proper crimping technique; paired with a quality ignition system, this wire delivers the clean spark every engine demands for peak horsepower and longevity.