Super Conductor 8.5 mm Spark Plug Wire, 100 ft. Bulk Roll [Red]

Name: Super Conductor 8.5 mm Spark Plug Wire, 100 ft. Bulk Roll [Red]
Brand: MSD IGNITION
SKU: 121-34049
Price: 362.95 USD
Availability: InStock

^$362⁹⁵

Ships on Nov 03, 2026

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Replacement/Bulk Wire

Bulk Spark Plug Wire for Building Custom Wire Sets

Fits Universal Custom Spark Plug Wire Applications

8.5 mm Diameter

100 ft. Roll

40 to 50 Ohms of Resistance per Foot

Copper Core

Red Insulation

Building your own plug wires is the only way to get exact lengths on a swap, a coil relocation or a set of headers that leave no room to spare. This 100 foot roll gives you enough wire for several sets. The conductor is wound very tightly around a ferro-magnetic center core, which keeps resistance low while still suppressing the electrical interference that upsets EFI and ignition electronics.

MSD 34049 Super Conductor 8.5 mm Spark Plug Wire Features:

8.5 mm diameter spark plug wire on a 100 foot roll.
Copper conductor over a ferro-magnetic impregnated center core.
40 to 50 ohms of resistance per foot.
Red insulation.
Requires terminals and boots, sold separately.

MSD's Universal Spark Plug Wire Sets are available in your choice of black or red wire for a variety of applications and include a spark plug terminal and installed boot with one open end. The set also includes distributor cap boots and terminals so the wire can cut to a specified length and installed with the supplied mini-stripper-crimper.

MSD's Replacement Spark Plug Wires and Coil Wires are made with the same Super Conductor wire as their universal and pre-made sets, just longer than normal for custom tailoring when you need that extra length.

Features:

Only 40-50 ohms resistance per foot of wire (lowest of any helically-wound wire)
MSD Ignition Copper alloy conductors result in less spark energy loss so more reaches spark plugs
Over 40 feet of conductor per foot of wire
Conductors are wrapped around ferro-magnetic center cores, which effectively suppresses electro magnetic interference
Outer sleeves consist of silicone and synthetic material for a strong resistance to heat, abrasion, and tearing.

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