Moroso Chevrolet Big Block Ignition Wire Set - Ultra 40 - Unsleeved - HEI - Under Header - Black

This is the Moroso Ultra 40 ignition wire set for Chevrolet big block engines. It's designed for HEI distributors and features an under-header routing to keep the wires away from hot exhaust manifolds. The unsleeved construction means these wires are built for direct heat resistance, making them a solid choice for performance builds where engine bay temperatures can get high.

Moroso uses a 40-ohm per foot resistance wire core in this set, which helps ensure a strong spark reaches your plugs without sacrificing ignition system efficiency. The black finish gives a clean, classic look under the hood. Because these are routed under the headers, you'll want to carefully measure your existing wire lengths or compare them to the routing path on your specific engine setup to ensure a good fit. This set is a popular option for enthusiasts looking to upgrade their ignition system on classic Chevy big blocks.