10.5mm spark plug wire set for Chevrolet engines. Compatible with BBC and SBC spark plug wires and serves as a replacement for HEI SBC BBC 350 383 454 spark plug wires. High performance spark plug wires. This 10.5mm cable set withstands extreme heat and voltages, enabling the engine to run at maximum potential power consistently without performance loss for long periods. High quality construction. This 10.5mm racing spark plug wires uses a high dielectric insulator and heavy glass braid wrapped around a heavy duty silicone jacket with high performance black boots. They withstand extremely high temperatures and abrasion, delivering stable performance and long service life. Universal compatibility. This 10.5mm spark plug wire is a perfect replacement for chevy 350 spark plug wires, HEI spark plug wires, 454 spark plug wires, 350 spark plug wires, BBC spark plug wires, CBC spark plug wires, BBC plug wires, SBC plug wire set, CBC plug wires, HEI plug wires. Use scenarios: - Replacing worn wires on a Chevy 350 small-block in daily driving or performance street builds. - Upgrading HEI/SBC/BBC systems in classic cars to maintain reliability in hot weather or high-load conditions. - Performance or race-oriented setups on SBC/BBC engines (such as 350, 383, or 454) requiring durable, high-heat, high-volt spark delivery.