MSD 32149 Super Conductor 8.5mm Spark Plug Wire Set Red LT1

The MSD 32149 Super Conductor Spark Plug Wire Set is a custom-fit, bolt-on ignition upgrade engineered specifically for the Chevy 350 LT1 engine. Featuring a bold red jacket and 8.5mm construction, this wire set delivers maximum spark energy to the plugs while keeping electromagnetic interference locked inside the wire where it belongs.

At the heart of the Super Conductor design is an ultra-low-resistance copper alloy conductor helically wound around a special center core. Each 12-inch length of wire measures only 40–50 ohms of resistance — the lowest of any helically wound wire on the market. The conductor is wound so tightly that over 40 feet of wire is packed into every single foot of plug wire, ensuring virtually no spark energy is lost before it reaches the plug.

The ferro-magnetic impregnated center core works in tandem with the tight winding to create a highly effective EMI choke, suppressing electromagnetic interference and protecting sensitive onboard electronics from ignition noise.

Key Features:

• 8.5mm diameter Super Conductor construction
• 40–50 ohms resistance per 12 inches — lowest of any helically wound wire
• Copper alloy conductor for superior voltage transfer
• Ferro-magnetic impregnated center core for EMI suppression
• Dual Crimp terminals — one crimp on the sleeve, one on the conductor — for a secure, reliable connection
• Outer sleeve made from a proprietary silicone and synthetic blend, highly resistant to heat, abrasion, and tearing
• 90-degree boot style for clean routing
• Pre-cut to exact specifications for a bolt-on fit
• Red jacket finish
• Legal for use on emissions-controlled vehicles

The MSD 32149 is a direct-fit replacement and performance upgrade for the Chevy 350 LT1 engine, delivering the reliability and spark energy transfer expected from MSD's Super Conductor line.