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The Moroso Ultra spark plug wire set for big-block Chevrolet engines is intended for under-the-header routing with 90° plug boots and HEI compatibility in red. It matches the connector angle and routing needed when wires pass beneath headers, helping preserve reliable spark transfer while protecting leads in high-heat under-header configurations on BBC installations.
Moroso BBC Under The Header 90 Deg Plug Boots HEI Ultra Spark Plug Wire Set - Red
