Two things matter in a plug wire set: whether the core suppresses the electrical noise that upsets an ignition box or radio, and whether the insulation survives sitting near hot headers. This set uses a magnetic Kevlar core for suppression and 8.5 mm EPDM insulation for heat tolerance, cut as an engine-specific set so the routing works out without slack loops.

Edelbrock 22712 Max-Fire Wire Set Specifications:

• 8.5 mm outside diameter, EPDM insulation in white.
• Magnetic Kevlar core, 50 ohms per foot resistance, noise suppressing.
• 90 degree HEI coil end boots and HEI terminals, 16 in. coil wire.
• Fits 1974-1988 small-block Chevrolet with HEI distributor.
• Engine specific set. Verify your distributor type before ordering.