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The Moroso Ultra spark plug wire set for big-block Chevrolet engines is built for under-header routing with sleeved construction and 135° plug ends, compatible with HEI distributors in a black finish. It helps protect wires from header heat while keeping reliable spark transfer for BBC applications. Use it to replace worn wiring in high-heat under-header installations.
Moroso BBC Under Header Sleeved 135 Plug End HEI Ultra Spark Plug Wire Set - Black
