-19%
Big3 Upgrade Quick View

Universal Big 3 Wiring Upgrade Kits

$109.99 $89.00
Big3
Big 3 Wiring Wiring, Plugs & Harnesses
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....
-13%
Big3 Upgrade Quick View

Polaris Slingshot Big3 Wiring Upgrade Kit

$149.00 $129.00
Big 3 Wiring Wiring, Plugs & Harnesses
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....
-25%
GM 4pin oval alternator harness plug Quick View

GM 4pin Alternator Harness

$19.99 $14.99
GM 4pin plug
Wiring, Plugs & Harnesses
GM 4pin Alternator Pigtail Plug used to wire multiple alternators or replace factory plug. (S-F-L)
-33%
JsAlternators External Regulator Plug Harness Quick View

External Regulator Plug

$29.99 $19.99
ExtRegPlug
Wiring, Plugs & Harnesses
JsAlternators plug is used for all external regulators with field wire. Used with Dodge/Chrysler oval plug
-50%
Honda OBD2 Js Alternators High Amp Quick View

Harness Honda OBD2 Alternator Adapter plug

$39.99 $19.99
Honda ODB2
Wiring, Plugs & Harnesses
Honda OBD to OBD2 Alternator Adapter Harness Plug
-50%
Sold out
Js Alternators High Amp Toyota Harness Plug Quick View

Toyota Alternator Adapter Plug

$39.99 $19.99
Toyota-Harness
Wiring, Plugs & Harnesses
Toyota Alternator Adapter harness plug
-50%
Js-Alternators cs144 to ad244 high amp adapter harness plug Quick View

Harness CS144 to GM AD244 4pin Oval Plug Adapter

$39.99 $19.99
CS144-AD244 Harness
Wiring, Plugs & Harnesses
CS144 to AD244 4pin Oval Adapter Harness
-42%
15.5v Regulator (ONLY for charging Cmax Lithium) *Requires wiring supplied plug. (Not for AGM Battery use)) - JS Alternators Quick View

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

$95.00 $55.00
Wiring, Plugs & Harnesses
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....
-26%
Tinned Copper Lugs - 10 Pack - JS Alternators Tinned Copper Lugs - 10 Pack - JS Alternators Quick View

Tinned Copper Lugs - 10 Pack

$18.99 $13.99
Wiring, Plugs & Harnesses
Tinned Copper Lugs - 10 Pack 5/16" stud, 3/8" cable  
-37%
2/0 Copper Lugs - 5/16 stud - 10 Pack - JS Alternators 2/0 Copper Lugs - 5/16 stud - 10 Pack - JS Alternators Quick View

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

$28.99 $17.99
Wiring, Plugs & Harnesses
2/0 Copper Lugs - 10 Pack 5/16 stud

Customer Reviews

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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