Ignitions and Electrical› Ignition Boxes and Components

MSD

Black Super Conductor Big Block Chevy '75-On, Hei For Use On Chevy Big Block '75-On, Hei, Black Jacket MSD Ignition

$417.73

SKU: M00T 31773

In Stock
In Stock
Ships by Jun 7
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Easy — 1–2 hours

Description

The MSD 31773 is a set of black Super Conductor spark plug wires designed for Chevy Big Block engines from 1975 onwards with HEI ignition. These wires feature an 8.5mm diameter with a low resistance of 40-50 ohms per foot, utilizing a copper alloy conductor and a tightly wound helically wound conductor around a ferro-magnetic center core. This construction minimizes electronic interference while maximizing spark energy delivery to the plugs. The outer sleeve is made from a blend of silicone and synthetic materials resistant to high heat, abrasion, and tears.

Fitment

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Specifications

BrandMSD
Part NumberM00T 31773

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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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