MSD 35609 Super Conductor 8.5mm Spark Plug Wire Set Big Block Chevy HEI Tower Cap

The MSD 35609 is a race-tailored 8.5mm Super Conductor Spark Plug Wire Set engineered specifically for Big Block Chevy engines running headers with an HEI tower-style distributor cap. Featuring 90-degree plug boots and an HEI male post distributor terminal, these wires route cleanly under headers and exhaust manifolds for a professional, clutter-free engine bay.

At the core of MSD's Super Conductor technology is a copper alloy conductor that delivers less than 50 ohms of resistance per foot — the lowest resistance of any helically wound wire available. Less resistance means more ignition energy reaches the spark plug, resulting in a stronger, more consistent spark and improved combustion of the air/fuel mixture.

To achieve maximum EMI suppression without sacrificing conductivity, MSD winds forty feet of conductor into every single foot of wire. This helical winding around a ferro-magnetic impregnated core creates a highly effective EMI choke, containing electromagnetic interference inside the wire and protecting sensitive onboard electronics from ignition noise.

Key Features:

• 8.5mm diameter spiral-core Super Conductor construction
• Less than 50 ohms per foot resistance for maximum spark energy delivery
• Ferro-magnetic impregnated core acts as an effective EMI choke
• 40 feet of conductor wound per foot of wire for superior EMI suppression
• DuPont Kevlar-reinforced conductor core for increased tensile strength and durability
• Proprietary outer sleeve compound resists high heat and abrasion
• 90-degree plug boots designed to route under headers/exhaust manifolds
• HEI-style male post distributor terminal for HEI tower cap fitment
• Color: Red

Individual wire lengths in this set are pre-cut and tailored to fit Big Block Chevy applications: Cylinder 1 — 42 in., Cylinder 2 — 41 in., Cylinder 3 — 34 in., Cylinder 4 — 34 in., Cylinder 5 — 28 in., Cylinder 6 — 31 in., Cylinder 7 — 24 in., Cylinder 8 — 23 in. Wire separators are not included. Not for use with magnetos.

This part is legal for sale and use on emissions-controlled and non-emissions-controlled vehicles, as it does not affect vehicle emissions.