Does it fit my GM vehicle?

It is built for GM vehicles from 1996 to 2024 and drops into the stock alternator location. Check your engine and accessory layout before ordering, since brackets and belt routing vary.

Do I need to upgrade the wiring?

Yes. A Big 3 wiring upgrade is required for all high-output alternators, including this one. Stock charge cables are not sized for 250+ amps.

What is the difference between this and the higher-amp versions?

This standard version is rated 250+ amps. Higher versions go up to 320, 370 and 400 amps for builds with heavier electrical loads.

Will the stock belt still fit?

With the stock-size pulley and factory-length belt, yes. If you fit the smaller pulley to spin it faster, you need a belt 1/2" to 1" shorter.

Which regulator should I choose?

It comes with seven regulator options for different charging voltages. Match it to your battery type and electrical setup, and ask the seller if you are unsure.

The billet high-output alternator and a smaller pulley. Wiring and belts are not included.

Where is the GM Billet High Output Alternator (Standard) cheapest?

At JS Ultimate Sounds, for $549.00, as of our latest check.

What do buyers say about the GM Billet High Output Alternator (Standard)?

Rated 5 out of 5 from 7 ratings.

Where can I buy the GM Billet High Output Alternator (Standard)?

2 stores we checked sell it, including JS Ultimate Sounds, JS Alternators.

GM Billet High Output Alternator Price History: Lowest $549.00

From JS Ultimate Sounds

Custom designed billet high-output alternator for GM vehicles 1996-2024
Direct fit into your stock alternator location
7 customized regulator options to choose from
Comes with a smaller pulley to spin faster and help produce maximum output
Amperage options: 250, 320, 370 and 400 amp
Big 3 wiring upgrade required for all high output alternators

Sizes: 250 amp alternator, 320 amp alternator, 370 amp alternator, 400 amp alternator
Fit: Direct fit into your stock alternator location for GM vehicles 1996-2024.
Sizing: With the smaller pulley, a 1/2" - 1" shorter belt is required (about 0.5–1" shorter unless otherwise specified).
Care: Clean all contact surfaces to bare metal and apply a corrosion inhibitor.
Guarantee: Most products are covered by the manufacturer's warranty against defects; damage from over-powering or improper installation isn't covered.
Returns: Approved returns may be subject to a restocking fee.
Shipping: Many in-stock orders ship within 1-2 business days, but timing varies by item; custom, built-to-order, oversized, special-order and supplier-direct products may
Packs: Big 3 Wiring Upgrade Kit is 10% off with a purchase of a JS Alternator using code BIG3DISCOUNT at checkout.
In the box: Billet high output alternator, Smaller pulley

About the GM Billet High Output Alternator (Standard)

Fitment:

This is a custom designed billet high-output alternator for GM Vehicles 1996-2024. Being a direct fit, this alternator fits directly into your stock alternator location.

Regulator:

This high-output alternator comes with 7 customized regulator options for you to choose from, as we know you may need to charge at certain voltages. If you have any questions regarding what voltage you need to charge at or which Regulator to choose, please call or email us at 888-245-3680 or questions@js-alternators.com

Pulley:

This alternator also comes with a smaller pulley, which causes it to spin faster than a larger pulley. This can help the alternator produce its maximum output. With a smaller pulley, it is required to install a 1/2" - 1" shorter belt.

See this Blog Article for assistance in finding the correct shorter belt.

Big 3 Wiring:

When Upgrading to a High-Output Alternator, it is required to upgrade your wiring with the Big 3 Wiring Upgrade Kit . It is recommended to use 1/0 100% copper wires for the upgrade. Our Big 3 Wiring Upgrade Kit is 10% off with a purchase of a JS Alternator; use code BIG3DISCOUNT at checkout.

Learn Why The Big 3 Wiring Upgrade Kit is Required for All High Output Alternators