MSD 8.5mm Super Conductor Spark Plug Wire Set for Small Block Chevy with Low Profile Distributor 31249

If you're running a small block Chevy with a low-profile distributor, spark plug wire quality directly impacts ignition timing consistency and combustion efficiency—especially under high RPM or forced induction. MSD's 8.5mm Super Conductor wires minimize signal loss and electromagnetic interference, delivering the crisp spark your engine needs for reliable power and repeatability. This is a bolt-on upgrade that pays dividends whether you're tuning on the dyno or racing at the track.

The 31249 kit features a ferro-magnetic impregnated core with copper alloy conductors wound to extreme density, resulting in less than 50 ohms per foot of resistance. That low resistance translates to maximum voltage delivery at the plug. The proprietary outer sleeve resists heat and abrasion, ensuring longevity in demanding engine bays. HEI-style terminals and 90-degree plug boots provide secure, vibration-resistant connections that won't loosen over time.

• 8.5mm Super Conductor core
• Copper alloy conductors
• Under 50 ohms/foot
• Ferro-magnetic EMI suppression
• 40+ feet wound conductor
• Heat and abrasion resistant
• 90-degree plug boots
• HEI style terminals
• Red jacket
• Small Block Chevy fitment
• Low-profile distributor compatible
• Complete installation kit