Shop Our Holiday Gift Garage Shop Now
Talk to Wrangler Enthusiasts
1-844-887-6502
Mon - Sun, 8:30 AM EST - 11:00 PM EST

Free Shipping on Orders Over $75. Details

PA Performance High Output Alternator - 120A (87-90 2.5L, 4.2L Wrangler YJ)

Market Price $153.99 You Save 9% ($14.00)
Our Price

$139.99 (each)

FREE Shipping
  • Item J102468
  • MPN# 1798H

In Stock Ships same business day. Choose options to add to cart

Features & Details

  • 100% New Upgrade Alternator
  • Includes Manufacturer One Year Warranty
  • High Output - Increases Charging Capacity
  • 60 Amps at Idle - 120 Amps at Maximum
  • Natural Cast Finish
  • Includes 6 Groove Serpentine Pulley
  • Requires Power Wire Upgrade
  • Fits 1987-1990 Jeep Wrangler 2.5L & 4.2L YJ Models
More Power. Upgrade to the 120 Amp PA Performance Jeep Alternator. This YJ alternator is a brand new upgraded replacement, not re-manufactured like other companies sell and is tested at the time of assembly for complete reliability. It comes with internal voltage regulator and a 6 groove serpentine pulley. The 120 Amp alternator will increase the charging capacity at all RPM Ranges and produces 60+ amps at idle and 120+ amps at maximum .

Peace of Mind. Why waste your time and money rebuilding your alternator over and over when it will only fail, replace it with a brand new high performance alternator that includes a Limited Lifetime Warranty directly from PA Performance for peace of mind.

Application. The PA Performance Alternator is an upgraded replacement to be installed on 1987 to 1990 Jeep Wrangler YJ models equipped with a 2.5L or 4.2L engine. This alternator requires an upgraded output wire (4 gauge or larger) and at least 175A fuse protection for installation.

Fitment: 1987 1988 1989 1990 Details

What's in the Box
  • (1) Alternator
Installation Info
Will it fit my Wrangler?
  • YJ - 87, 88, 89, 90

Most Helpful Reviews

5/5
Great upgrade

I purchased this alternator to upgrade from the stock 94 amp. My Jeep Wrangler YJ has factory a/c and the previous owner put the wrong alternator in, he replaced it with the 78 amp one. I noticed quite ...

Read More
Helpful (2)

5/5
So far, so good

Everything I needed was included with the alternator, with the exception of a larger ring terminal to make the connection to the existing wiring. The alternator came with a 6 groove serpentine belt pulley ...

Read More
Helpful (1)

Overall Rating 5 out of 5 stars
Read All 2 Reviews

Customer Photos (2) Submit Your Photo

View All 2 Photos

You Might Also Like

Q & A

No questions about this product yet.

Ask the First Question

More Products You Might Like

Customer Reviews (2) Write a Review

Overall Rating 5.0

out of 5 stars

  • Fit 5 5
  • Bang For Your Buck 5 5



  • 5/5

    March 08, 2017

    Great upgrade

    I purchased this alternator to upgrade from the stock 94 amp. My Jeep Wrangler YJ has factory a/c and the previous owner put the wrong alternator in, he replaced it with the 78 amp one. I noticed quite a difference in the charging and now when I have my headlights and radio on, my volt meter doesn't drop! Very happy with this alternator!

    Kaitlyn

    Year: 1988Submodel: Wrangler

    Helpful (2)

  • 5/5

    March 17, 2017

    So far, so good

    Everything I needed was included with the alternator, with the exception of a larger ring terminal to make the connection to the existing wiring. The alternator came with a 6 groove serpentine belt pulley installed, but the v-belt pulley was included and only took a minute to swap out. Total installation time was about an hour, mostly because I had to find my package of larger ring terminals.

    LloydC

    Year: 1987Submodel: Wrangler

    Helpful (1)

Related Wrangler Categories