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

The Ultra 40 Wire Set 8.5mm GM LS/LT 11.0 Red by MOROSO is engineered for serious LS and LT engine builders who demand maximum ignition reliability and consistent spark delivery under extreme operating conditions. This premium ignition wire set is specifically designed for high-output GM Gen III, Gen IV, and Gen V small-block engines, whether you're tuning a street performer, track car, or dedicated racing engine. If you're upgrading a carburetor or fuel-injected LS platform and want spark plug wires that won't degrade under boost, heat, or extended rpm pulls, this Moroso offering delivers the proven technology that engine builders trust.

The 8.5mm wire diameter provides optimal conductor cross-section for low resistance and efficient energy transfer to the spark plugs, critical for fuel-efficient combustion and power output optimization. MOROSO's Ultra 40 construction features a high-temperature silicone jacket rated for sustained underhood temperatures, resisting cracking and electrical leakage that plague older or inferior wire sets. The deep red finish offers both visual appeal and UV/ozone resistance; conductor geometry is engineered to minimize RFI (radio frequency interference) while maintaining spark timing accuracy across the full rpm range. The set includes all eight wires pre-cut and terminated to OEM specifications, eliminating guesswork during installation and ensuring proper gap alignment at each cylinder.

Engine enthusiasts running LS or LT powerplants—whether in a Chevy Camaro, Corvette, truck, or custom hot rod—will benefit from the durability and electrical consistency this set provides during sustained driving, street racing, or circuit work. Installation is straightforward: simply route the wires away from exhaust manifolds and hot chassis components, securing them with factory clips or aftermarket holders. Compatibility spans all 8-cylinder LS1, LS2, LS3, LS7, LT1, and LT4 variants; verify your coil-pack configuration before ordering to ensure proper fit with your specific ignition system.