✨ Christmas Special: Get 35% OFF your first order. ✨

Your Shopping Bag

Your bag is empty

Subtotal $0.00
Shipping Calculated at checkout
Continue Shopping

Direct Price 1978-1980 Chevrolet Monza V6 3.8l 12si High Output Alternator Special: 90% Discount [ufe5p4aW]

$57.99 $185.99 -69%

Fitment: This is a direct fit high-output alternator for the 1978-1980 Chevrolet Monza 3.8L. Being a direct fit, this alternator fits directly into your stock alternator location. Plug: This high-output alternator comes with a separate adaptor plug.

Secure Shopping

100% Safe Guarantee

Free Shipping

On orders over $30

Money-Back

30-Day Guarantee

Direct Price 1978-1980 Chevrolet Monza V6 3.8l 12si High Output Alternator Special: 90% Discount [ufe5p4aW]

Fitment:

This is a direct fit high-output alternator for the 1978-1980 Chevrolet Monza 3.8L. Being a direct fit, this alternator fits directly into your stock alternator location.

Plug:

This high-output alternator comes with a separate adaptor plug. One side will plug directly into the aftermarket high-output alternator, and the other side will plug into the factory plug.

NOTE: If you require charging at a certain voltage setpoint, we offer a selection of different voltage regulators that you will need to purchase with the alternator for it to be installed. View our Regulator Options Here.

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

What Our Customers Say

February 5, 2026

Absolutely no complaints!

It's a very practical and smart product.

- Gideon J..

February 5, 2026

Absolutely no complaints!

A great gadget that is very handy.

- Zenna F..

February 5, 2026

Absolutely no complaints!

An outstanding tool. Very solid.

- Delyth Q..

Write a Review

You Might Also Like

Discover more great products from our collection.

Men's Wedding Band - Celtic II

Men's Wedding Band - Celtic II

(275)
$44.99 $143.99 -69%
Cognac Business Portfolio

Cognac Business Portfolio

(945)
$32.99 $105.99 -69%

Copyright 2026 © mappa-mercia.org

VISA
PayPal
Stripe
Mastercard
CASH ON DELIVERY