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- Proform Lightning-Bolt 100 Amp Mini Alternators
Over a 100 Amps Output from a Mini, Lightweight Alternator
Proform Lightning-Bolt 100 Amp Mini Alternators are 40 percent lighter than other 10SI alternators, making them ideal for racing with the Amps needed for the street.
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Mini-Alternator
Lightning-Bolt 100 Amp Mini-AlternatorOver 80 Amps at Idle to Over 100 at Top End 1-Wire 12 Volt Hook-Up Internal Regulator 98 mm Stator 100 Amp Internal Fan 2 3/4 in. V-Belt Pulley Lightweight Only 7 lbs. Aluminum
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$252.95
Estimated to ship direct from manufacturer on 07/27/26, pending manufacturer availability.
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Proform 66435K
Proform Lightning-Bolt 100 Amp Mini-Alternator Kit for Chevy Small Block, Big Block Engines
Lightning-Bolt 100 Amp Mini-Alternator KitIncludes:
- 100 Amp Mini-Alternator
- Low-Mount Kit for Chevy Small, Big Block Engines
- High-Output Alternator Wiring Kit
- 50 Amp Fuse Block w/Fuse and Cover
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$386.08
Estimated to ship direct from manufacturer on 08/17/26, pending manufacturer availability.
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Mini-Alternator w/10SI Mount
Lightning-Bolt 100 Amp Mini-Alternator w/10SI MountOver 80 Amps at Idle to Over 100 at Top End 1-Wire 12 Volt Hook-Up Internal Regulator 98 mm Stator 100 Amp Internal Fan 2 3/4 in. V-Belt Pulley Lightweight Only 7 lbs. Aluminum
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$267.95
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Pulleys
Serpentine Alternator PulleyFits Lightning-Bolt Alternators 66435, 66437 For Use With 5-Groove Serpentine Belts Direct-Replacement for Lightning-Bolt V-Pulley High-Quality Steel Sold Individually
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$32.99
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Serpentine Alternator PulleyFits Lightning-Bolt Alternators 66435, 66437 For Use With 6-Groove Serpentine Belts Direct-Replacement for Lightning-Bolt V-Pulley High-Quality Steel Sold Individually
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$32.99
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Serpentine Alternator PulleyFits Lightning-Bolt Alternators 66435, 66437 For Use With 7-Groove Serpentine Belts Direct-Replacement for Lightning-Bolt V-Pulley High-Quality Steel Sold Individually
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$32.99
$24.74
SAVE $8.25
Estimated to ship direct from manufacturer in 24hrs
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