The 20 Amp Pro-Mag was developed for racers running a 12 Amp system who wanted more power without stepping up to a full 44 Amp system. MSD engineers reworked the generator's internals to deliver the increased current through the same Electronic Points Box, PN 8106. It's a favorite in alcohol-burning applications such as Sportsman Dragsters and Quick-8 racers.
Specifications:
- Part Type: Magneto
- Sub Category: Distributor and Magneto
- Rotation: Clockwise (CW)
- Mount Style: Band clamp, large Ford-style cap with heavy duty retainer
- Required Points Box: PN 8106
- Part Number: 81502
Requires the PN 8106 Electronic Points Box to operate.
Compliance: This part is legal for sale and use on Racing Use Only Vehicles — competition vehicles that are not registered and never operated on the street. It is against the law to install this part on an Emissions Controlled Vehicle (1966-and-newer California-certified or 1968-and-newer federally certified vehicles).
FAQ
How much current does the MSD 81502 generator produce?
It produces 20 amps of primary current, more than the 12 Amp Pro-Mag but less than the 44 Amp version.
What points box does this generator require?
It requires MSD's Electronic Points Box, PN 8106, to deliver its increased current.
What applications is the 20 Amp Pro-Mag popular in?
It's a favorite in alcohol-burning applications such as Sportsman Dragsters and Quick-8 racers.
Is this generator legal for street use?
No. It's Emission Code 4, Racing Use Only — legal for sale and use only on unregistered competition vehicles, not on emissions-controlled street vehicles.
