This MSD 31359 Super Conductor 8.5MM Spark Plug Wire Set is the ultimate performance wire for 1975-1986 Small Block Chevy 350 engines using an HEI distributor! These wires use a helically wound copper alloy conductor with only 40-50 ohms resistance per foot of wire. As a result, less resistance means more energy to the spark plug to ignite the air/fuel mixture! Each foot of finished wire features 40 feet of this conductor for high EMI suppression as well as superior conductivity! This highly effective “choke” keeps the Electro Magnetic Interference inside the wire as well as away from other electronics. This combination is encased in a heavy-duty sleeve that withstands abrasion as well as high temperatures. Stainless steel Dual Crimp snap lock terminals as well as high temperature boots ensure you have the best wire available. MSD 31359 Super Conductor Spark Plug Wire Set Features: Fits: 1975-1986 Small Block Chevy 350 engines using an HEI distributor Wire Color: Red Spark Plug Boot Color: Gray Distributor Boot Color: Gray Diameter: 8.50mm Spark Plug Boot Ends: Eight Multi-Angle Distributor Terminal Ends: Male/HEI Spark Plug Boot Material: Silicone Distributor Boot Material: Silicone Conductor Style: Spiral Core Spark Plug Wire Resistance: 50 ohms/ft. RFI Suppression: Yes Coil Wire Included: Yes Clip-On Cylinder Markers Included: Yes Assembled: Yes Quantity: Sold as a set From street cruisers to Top Fuel dragsters, MSD's ignition systems have been the industry leader for over 40 years without reservation. MSD continues to push the envelope with cutting-edge ignition technology as well as intake manifolds and EFI systems.