Wiring, Plugs & Harnesses

-17%

Universal Big 3 Wiring Upgrade Kits

$119.99 $99.00

Big3 Wiring kits have more Copper than any other manufacturer. Period. True 1/0 Pure Copper Big 3 Wiring Upgrade kit 1/0 Pure Copper cable.4...

-12%

Polaris Slingshot Big3 Wiring Upgrade Kit

$159.00 $139.00

Big3 Wiring kits have more Copper than any other manufacturer. Period. True 1/0 Pure Copper Big 3 Wiring Upgrade kit 1/0 Pure Copper cable....

-33%

External Regulator Plug

$29.99 $19.99

JsAlternators plug is used for all external regulators with field wire. Used with Dodge/Chrysler oval plug

-50%

Harness Honda OBD2 Alternator Adapter plug

$39.99 $19.99

Honda OBD to OBD2 Alternator Adapter Harness Plug

-50%

Sold out

Js Alternators High Amp Toyota Harness Plug

Toyota Alternator Adapter Plug

$39.99 $19.99

Toyota Alternator Adapter harness plug

-50%

Sold out

Js-Alternators cs144 to ad244 high amp adapter harness plug

Harness CS144 to GM AD244 4pin Oval Plug Adapter

$39.99 $19.99

CS144 to AD244 4pin Oval Adapter Harness

-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....

-37%

2/0 Copper Lugs - 5/16 stud - 10 Pack

$28.99 $17.99

2/0 Copper Lugs - 10 Pack 5/16 stud

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.

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.

-28%

Jeep Big 7 Wiring Upgrade Kit

$249.00 $179.00

Jeep Big7 Wiring Kit. We use premium pure copper 1/0 cables, with copper lugs crimped and heat shrinked.

-26%

Brush Holder Assembly

$14.99 $10.99

Brush holder assembly for hairpin alternators

-23%

Sold out

GM 1 wire regulator and harness

$59.00 $45.00

GM 14.8v internal regulator with 1 wire pigtail wiring plug harness. This item is non-returnable, no warranty.

-70%

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..

2011-2020 Chevy Impala 250-320-370-400amp Alternator

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

2003-2005 Chevy Cavalier 250-320amp Alternator

Categories

Universal Big 3 Wiring Upgrade Kits

Polaris Slingshot Big3 Wiring Upgrade Kit

External Regulator Plug

Harness Honda OBD2 Alternator Adapter plug

Toyota Alternator Adapter Plug

Harness CS144 to GM AD244 4pin Oval Plug Adapter

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

2/0 Copper Lugs - 5/16 stud - 10 Pack

14.8v Self Excite Regulator

14.8v Internal Regulator with pigtail plug

Jeep Big 7 Wiring Upgrade Kit

Brush Holder Assembly

GM 1 wire regulator and harness

JsAlternators Sunglasses

Jeep Ducks for Ducking