Moroso Chevrolet Big Block Ignition Wire Set - Ultra 40 - Unsleeved - HEI - Crab Cap - Red

If you're working on a Chevrolet big block engine with an HEI distributor and need a new set of spark plug wires, this Moroso Ultra 40 set is a solid option. These wires are designed to handle the demands of a high-performance ignition system, ensuring a strong spark gets to your plugs for efficient combustion. The unsleeved design means the conductor is directly exposed, which can help reduce resistance for a hotter spark compared to some other types.

Moroso built these wires with their Ultra 40 technology, which uses a ferrite-infused nylon jacket over a suppressed-resistance conductor. This combination helps minimize radio frequency interference, keeping your radio and other electronics clear, while still delivering a powerful spark. The red color adds a nice visual touch under the hood, especially on a classic build. They're made to fit HEI distributors with the crab-style cap, so make sure that matches what you have.

When installing, take your time routing the wires to keep them away from hot exhaust manifolds or spinning engine components. Proper routing is key to preventing premature failure and ensuring consistent performance. This set is a direct replacement for many Chevrolet big block applications, making the swap straightforward if your existing wires are worn out or damaged.