MSD Pro Mag 8139MSD 12 Amp Magneto

Part # 8139MSD Be the first to write a review

Compatible with Tall Deck Small and Big Block Chevy®. This product is not created or sold by Chevy®. Supplied with a cap, rotor, wire retainer, bronze gear and a Billet Hold-Down Clamp.

Estimated Ship Date: 08/12/2026

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Two taller, one-piece housings are available for Chevrolet engine blocks with taller deck heights. Each generator features an adjustable slip collar that provides easy adjustment of the magneto and cam gear alignment. This is critical for engines with varying deck heights, custom heads and modified intakes.

Brand	MSD
Emission Code	4
Product Type	Amp Generators
Warranty	Manufacturer's Limited 1 Year
UPC	085132081394
Manufacturer Part Number	8139MSD
Part Number	8139MSD

This part is legal for sale or use on Racing Use Only Vehicles

The following vehicles are considered Racing Use Only Vehicles:

Racing Use Only Vehicles are vehicles that are used exclusively for competition that are not registered and that may never be used on the street.

WARNING: It is against the law to install this part on an Emissions Controlled Vehicle

Instructions for Part# 8139MSD

Manufacturer's Limited 1 Year: See Details

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Some parts are not legal for use in California or other states with similar regulations.