MSD 31869 Super Conductor 8.5mm Spark Plug Wire Set Buick Grand National 3.8L V6 Distributorless Red

The MSD 31869 Super Conductor Spark Plug Wire Set is a direct-fit, high-performance ignition wire set engineered specifically for the Buick Grand National and T-Type equipped with the 3.8L V6 distributorless ignition system. Featuring a bold red jacket and precision-cut lengths, this set delivers a true bolt-on upgrade over factory wires.

At the heart of each wire is MSD's proprietary 8.5mm helically wound copper alloy conductor, delivering an industry-leading resistance of just 40–50 ohms per 12-inch length — the lowest of any helically wound wire — while simultaneously providing RFI suppression equivalent to a 1,500-ohm wire. Each foot of finished wire contains over 40 feet of tightly wound copper conductor wrapped around a ferro-magnetic impregnated center core, creating a highly effective Electro Magnetic Interference (EMI) choke that keeps interference contained and away from sensitive vehicle electronics.

Key Features:

• Ultra-low resistance: Only 40–50 ohms per 12 inches for maximum spark energy delivery to the plug
• Superior EMI/RFI suppression: Ferro-magnetic impregnated core acts as an EMI choke, equal to a 1,500-ohm suppression wire
• 8.5mm diameter spiral core construction for strength and durability
• Copper alloy conductor wound at 40+ feet per foot of wire for exceptional conductivity
• Dual Crimp terminals: Separate crimps for the sleeve and conductor ensure a secure, low-resistance connection
• High-temp outer sleeve: Proprietary silicone and synthetic blend resists heat, abrasion, and tears
• Custom precut lengths: Wires are cut to exact specifications for a clean, factory-style installation
• 180° coil boots with straight/multi-angle plug boots for proper fitment on the 3.8L V6 distributorless system
• Red jacket finish for a clean, performance engine bay appearance
• Sold as a complete set

The MSD 31869 is the definitive plug wire upgrade for Buick Grand National and T-Type builds, combining race-proven ignition technology with a hassle-free, vehicle-specific fit.