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The Moroso Ultra spark plug wire set for BBC engines routes under the header and uses 90° plug ends with HEI-compatible sleeved boots in black. Intended for big‑block Chevy applications with tight header clearance, the under-header configuration and right-angle boots help position wires away from exhaust heat while maintaining HEI distributor compatibility.
Moroso BBC Under Header 90 Deg Plug End HEI Sleeved Ultra Spark Plug Wire Set - Black
