Free Shipping on Orders Over $75. Details

Talk to Wrangler Enthusiasts
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Win $6,000 In Store Credit Enter Now

Master Filter Kit (87-90 4.2L Jeep Wrangler YJ)

Item J113589
Call a Wrangler Enthusiast at 1-877-870-8556
M-F 8:30A-11P, Sat-Sun 8:30A-9P
Market Price $21.99 You Save 8% ($1.82)
Our Price

$20.17 (kit)

FREE Shipping on orders over $75

Will this fit your Vehicle?

Select a different vehicle Help?
Update or Change Vehicle
In Stock  

Ship to: Ashburn - 20149
Sorry, please enter a valid US or CA postal code
We're sorry, zip can't be updated at this time.
    Create a list
    Add to New List

    Saved - View your saved items

    We're sorry. We couldn't save this product at this time.

      Product Information

      Features, Description, Specs & Installation


      • Durable Construction Combination of Steel, Rubber, Plastic, and Paper
      • Precision Made
      • Uses Existing Hardware
      • Sold As A Kit
      • Improves Drive Performance
      • Removes Water Moisture
      • Manages Oil Environment
      • Provides Excellent Filtration
      • Easy Installation
      • Install Time Is 1 Hour
      • Fits All 1987-1990 4.2L Jeep Wrangler YJ Wrangler Models


      Unparalleled Technology. Manufacturer continues to build quality aftermarket upgrades that will give your Jeep the edge when it comes to performance. These Master Filter Kit MFK21 is an unparalleled filter kit that improves your engine’s performance. Made for a combination of sturdy materials that include OE certified steel, rubber, plastic and paper, this kit is precision made to be an exact fit to your Jeep.

      Incomparable Quality. This incredible filter kit provides excellent filtration by managing your oil’s environment under the hood. This clever technology removes water moisture so you won’t have to worry about contaminating your oil well supply.

      Superior Performance. Made in America, this superior kit is sold as a kit and uses your Jeep’s existing hardware for an easier installation.

      Installation. The installation for this product can be easily accomplished in approximately 1 hour. The need for common garage tools is required.

      Application. These Master Filter Kit MFK21 fits all 1987-1990 4.2L Jeep Wrangler YJ Wranglers models.

      Fitment: 1987 1988 1989 1990 Details

      MPN# MFK21

      CA Residents: WARNING: Cancer and Reproductive Harm -

      Installation & What's in the Box

      Installation Info

      What's in the Box

      • (1) Filter

      Questions & Answers

      10 More Questions

      Will It Fit My Wrangler

      • YJ Wrangler 2 Door - 87, 88, 89, 90

          Related Wrangler Categories