Brand: MSD Ignition
Manufacturer's Part Number: 31689
Part Type: Spark Plug Wire Sets
Product Line: MSD 8.5mm Super Conductor Spark Plug Wire Sets
Automotive Fittings Part Number: MSD-31689
UPC: 085132316892
Assembled: No
Distributor Terminal Type: Male/HEI and Female/Socket
Distributor Boot Color: Gray
Distributor Boot Material: Silicone
Spark Plug Boot Ends: Four 90 degree
Spark Plug Boot Color: Gray
Spark Plug Boot Material: Silicone
Diameter (mm): 8.50mm
Wire Color: Red
RFI Suppression: Yes
Coil Wire Included: No
Conductor Style: Spiral core
Spark Plug Wire Resistance: 50 ohms/ft.
Quantity: Sold as a set.
Notes: Coil ends feature special locking terminals pre-installed. Spark plug boots are included but not installed. Includes vice mount wire crimping tool.
Description:
MSD 8.5mm Super Conductor spark plug wire sets feature a special helically wound core that has just 40-50 ohms of resistance per foot—but with an RFI suppression equal to a 1,500 ohm wire. In fact, each foot of finished wire includes 40 ft. of tightly wound copper for superior conductivity. This winding procedure, combined with a ferro-magnetic impregnated center core, produces an extremely effective Electro Magnetic Interference "choke." This choke, or suppression capability, keeps the EMI inside the wire where it cannot interfere with other electronics on your vehicle.

A tough, 8.5mm synthetic/silicone jacket over an extra-heavy glass braid and dielectric insulator keeps the current guided to the plugs. Underneath the high-temperature boots, dual crimp stainless steel terminals feature snap-locks to ensure a secure fit. Each set comes with clip-on cylinder markers for easy identification. MSD's 8.5mm Super Conductor wire sets are available in custom or universal-fit applications, assembled or not, with a variety of terminal and boot end options.