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The Moroso Ultra 40 ignition wire set for Chevrolet big block engines is an unsleeved HEI under-header kit in blue, configured to run beneath headers while preserving HEI connector compatibility. It supplies the specified boot angles and conductor lengths for under-header routing on big block HEI setups, providing a direct-replacement wiring solution that keeps OEM-style placement intact.
Moroso Chevrolet Big Block Ignition Wire Set - Ultra 40 - Unsleeved - HEI - Under Header - Blue
