MSD
Pro Mag 12 Amp Generator, Chevy V8, Tall
Part # 8139MSD
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Supplied with a cap, rotor, wire retainer, bronze gear and a Billet Hold-Down Clamp.
Pro Mag 12 Amp Generator, Chevy V8, Tall
Estimated Ship Date: 06/24/2026
Free Shipping - Lower 48 US States
MSRP $4,106.95
$3,283.95
Save $823.00
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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.
| Amperage Rating | 12 68 |
|---|---|
| Brand | MSD |
| Category | Electrical, Charging and Starting |
| Emission Code | 4 |
| part type | Generator |
| Pulley Included | No |
| Sub Category | Alternator / Generator and Related Components |
| UPC | 085132081394 |
| Warning | California Proposition 65 |
| Part Number | 8139MSD |
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Supplied with Terminals, Seals, and Housings$22.46Qty:![Adjustable Collar]()
![Replacement Cap and Rotor for Pro Mag, Red]()
Replacement Pro Cap Red, 3" terminal to terminal diameter$134.95Qty:![Oversize Chevy Distributor Gear, Bronze, +0.006"]()
MSD's bronze oversized gears help obtain perfect timing by meshing to the camshaft gear properly.$120.55Qty:
4
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
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*Free Shipping and Handling only offered to the contiguous US on orders over $149, excludes clearance parts and oversized packages.
Some parts are not legal for use in California or other states with similar regulations.