All products - jsalternators-a4f9

-41%

12si classic car 250amp b-stock alternator

$409.00 $239.00

12si classic car 250amp b-stock alternator 30day warranty. 12 and 6 mounts We also have GM ad244 style 250amp b stock with serpentine pulley

14.8v GM Internal Regulator with pigtail plug - JS Alternators

14.8v Internal Regulator with pigtail plug

$45.00

14.8v internal regulator with pigtail wiring plug harness. This item is non-returnable, no warranty.

14.8v Self Excite Regulator

$45.00

14.8volt Self excite regulator. No plug connections needed. this item is non-refundable part. no warranty on diy parts.

-42%

15.5 Volt Regulator (ONLY for charging Cmax Lithium) *Requires wiring supplied plug. (Not for AGM Battery use)) - JS Alternators

15.5 Volt Regulator (ONLY for charging Lithium over 15volts) (Not for AGM Battery use)

$95.00 $55.00

Verify your battery’s maximum charging voltage before ordering. *Requires wiring supplied plug. *May cause Battery Light. The regulator must be installed in the alternator....

-22%

JS Alternators High Output Amp Alternator

1963-1987 Olds/Buick ALL ENGINES w/ 12SI 250-320amp Alternator

$449.00 $349.00

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin...

-22%

1963-1991 Chevy Cadillac All early models V-8 250-320amp Alternator

$449.00 $349.00

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin...

-22%

1964-1984 Pontiac 250amp alternator

$449.00 $349.00

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin...

-22%

1965-1990 Ford All except FE Engines 250-320amp Alternator

$559.00 $439.00

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin...

-22%

1965 - 1985 Ford FE High Output Amp Alternator

1965-1994 Ford FE Engines 250-320amp Alternator

$559.00 $439.00

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin...

-22%

JS Alternator High Output Amp Alternator

1966-1991 Ford Ranger 250amp Alternator

$559.00 $439.00

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin...

-22%

1973-1985 Buick Regal 12SI 250-320amp Alternator

$449.00 $349.00

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin...

-22%

1979-1986 Mercury Capri 250amp Alternator

$449.00 $349.00

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin...

-22%

1979-1995 Ford Mustang 250amp Alternator

$449.00 $349.00

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin...

-22%

1980-1996 Chevy Caprice 250-320-370-400-425amp Alternator

$709.00 $559.00

This unit replaces the cs144 style 12/6 mount with serpentine belt. Hairpin units are commonly called 6 phase. They produce more output at idle...

-22%

1981-1987 Buick Regal GNX 250 to 320amp Alternator

$449.00 $349.00

Buick Grand National GNX Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional...

-22%

1963 - 1985 Buick Riviera High Amp Output Alternator

1984-2002 Toyota 4Runner 250-320amp Alternator

$449.00 $349.00

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin...

-22%

1984-2005 Chevy S-10 blazer 250-320-370-400-425amp Alternator

$709.00 $559.00

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin...

-22%

1986-1991 Mercury Grand Marquis 2G 250amp Alternator

$449.00 $349.00

This unit fits 2G applications only. Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than...

-22%

1986-1993 Buick Lesabre 250-320-370-400amp Alternator

$709.00 $559.00

The 3 Phase unit is referred to as a slot wound alternator. This unit provides power and durability at an affordable price. Featuring premium...

-22%

1986-1995 Buick Riviera 250-320-370-400amp Alternator

$709.00 $559.00

The 3 Phase unit is referred to as a slot wound alternator. This unit provides power and durability at an affordable price. Featuring premium...

-22%

1986-1996 Cadillac Fleetwood 250-320-370-400-425amp Alternator

$709.00 $559.00

This 6 phase small case hairpin alternator is our more sophisticated alternator with a higher output than a standard slot wound. Along with dual...

-22%

1986-1999 Cadillac Deville 250-320-370-400-425amp Alternator

$709.00 $559.00

This 6 phase small case hairpin alternator is our more sophisticated alternator with a higher output than a standard slot wound. Along with dual...

-22%

1986-2001 Acura Integra 250-320amp Universal Alternator

$449.00 $349.00

* Please note this is a universal alternator, not a direct fit. Hairpin units are commonly called 6 phase. They produce more output at...

-22%

1986-2002 Cadillac Eldorado 250-320-370-400amp Alternator

$709.00 $559.00

The 3 Phase unit is referred to as a slot wound alternator. This unit provides power and durability at an affordable price. Featuring premium...

-22%

1987-1992 Ford F-150 250-320amp Alternator

$449.00 $349.00

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin...

-22%

1987-1993 Ford Mustang 250amp Alternator

$559.00 $439.00

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin...

-22%

1987-1995 Chevy suburban 250-320-370-400amp Alternator

$709.00 $559.00

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin...

-22%

1987-1995 Chevy Tahoe 250-320-370-400-425amp Alternator

$709.00 $559.00

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin...

-22%

1987-1995 GMC Full size truck 250-320-370-400-425amp Alternator

$709.00 $559.00

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin...

-22%

1987-1996 Chevy Caprice 250-320-370-400-425amp Alternator

$709.00 $559.00

This unit replaces the cs144 style 12/6 mount. Hairpin units are commonly called 6 phase. They produce more output at idle and are more...

-22%

1987-2001 Jeep Cherokee All engines 250-320amp Alternator

$449.00 $349.00

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin...

-22%

1987-2004 GMC Suburban 250-320-370-400-425amp Alternator

$709.00 $559.00

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin...

-22%

1987-2004 GMC Yukon 250-320-370-400-425amp Alternator

$709.00 $559.00

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin...

-22%

1987-2005 Chevy Astro 250 to 425 amp Alternator

$759.00 $609.00

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin...

-22%

1988-1991 Honda Civic 250-320amp Alternator

$449.00 $349.00

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin...

-22%

1988-1991 Honda CRX 250 - 320amp Alternator

$449.00 $349.00

Hairpin units are commonly called 6 phase. They produce more output at idle and are more efficient than a conventional alternator. JS Alternators hairpin...

Items 1 to 36 of 659 total

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Customer Reviews

2012-2021 Jeep Wrangler 250 to 425amp Alternator.

Look and Runs Amazing

Brandon Manis, April 2022

Every single audio build I’ve done always has a JS alternator. Great customer service, amazing pricing, very fast shipping, got my alternator within a week and it’s a pretty rare car so I was surprised at the speed they had my alternator built and shipped out to me. Amazing company and I will continue to use them and represent them on all of my builds, highly recommended and very good quality product.😌 (also their powder coating is perfection)

Very Nice Alternator

Paul Nelson, March 2022

I will not consider going anywhere else for my high output alternators. 10.5kw of bass amps on my daily driver and I do not lose even a thenth of a volt while driving at full tilt! Two vehicles and two alternators and zero problems with the alternators, customer support, or shipping times. Customer for life here! Do not hesitate. 👍

Super Impressed

Kino Hicks, April 2021

Just got mine and super impressed. The customer service was very helpful and I would encourage anyone who needs a high output alternator to use these guys!!!

They're so great they even shipped out my made to order alternator on New Year’s Eve.

Petey Parado, May 2021

Ordered my alternator a week before Christmas 2020.They emailed to confirm my address in Hawaii. I emailed back and they responded quickly.There so great they shipped out my made to order alternator on New Year’s Eve. I received it on the 4 of January 2021. It came with everything I needed. Shorter bet I got from local auto parts store.your JS ALTERNATOR made my sound system very happy voltage stays above 14v. THANKS,Jonathan from Kauai Hawaii..

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Look and Runs Amazing

Very Nice Alternator

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They're so great they even shipped out my made to order alternator on New Year’s Eve.

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