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Vehicle Info NeededPROFORMPART NUMBER: 778-66663
Alternator 10SI Adapter Kit for Lightning-Bolt 100 Amp Mini-Alternator
$3899
Ships on Nov 11, 2026
Lowest Price GuaranteeItems You Need
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Alternator Mounts
- Alternator 10SI Adapter Kit
- Mounts Directly to Lightning-Bolt Alternator
- Converts the Alternator to 10SI Mount for Easy Installation
- Billet Aluminum
- Black Anodized
- Sold as a Kit
This Proform 66663 Alternator 10SI Adapter Kit converts the Lightning-Bolt Alternator into 10SI style for easy removal and replacement. Attach with the included bolt and spacer, and conversion is complete.
Make it Easy to Remove and Install Your Alternator
Proform Alternator Brackets, Spacers, and Mounts give your engine that long-lasting, professional look you want.
Part TypeAlternator Bracket
Product LineProform Alternator Brackets
BrandPROFORM
Package Height3.25
Package Width3.25
Package Length6.75
Weight0.75 PG
Hardware IncludedYes
QuantitySold as a Kit
Mounting Type10SI
Bracket FinishBlack
Bracket MaterialBillet aluminum
Vendor Part Number66663
Package Qty1
Package TypeEA
Some parts are not legal for use in California or other states with similar laws / regulations
