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Rock Hard 4x4™ Aluminum DEF / Muffler Skid Plate for Jeep Wrangler JL 4DR 2020 - Current [RH-90550]

Rock Hard 4x4™ Aluminum DEF / Muffler Skid Plate for Jeep Wrangler JL 4DR 2020 - Current [RH-90550]

2 Reviews
  • 1/4" Thick Aluminum
  • 100% Bolt on Install
  • Interlocking Skid System
  • Black Powder Coat Finish
  • 100% Made in USA
  • Lifetime Warranty
  • FINISH: Black Powder Coat
  • California Residents: WARNING
  • .: Please click here for your Propsition 65 warning.
Part Number: RH-90550
Rock Hard 4x4 is very proud to offer the Heaviest Duty DEF / Muffler Skid Plate for the Jeep Wrangler JL 4DR 2020 - Current.


Hardcore rock crawlers and light duty fire road explorers alike need to add the Rock Hard 4x4 skid plate system to their build list. Protect your extremely vulnerable engine exhaust muffler from trail debris and obstacles with our 1/4" thick plate aluminum skid plate.

Our 1/4" thick skid plate is made from a solid sheet of aluminum then bent, formed, and hand welded into it's highly protective shape. Designed to work in conjunction with factory/OEM rear bumper or our RH-90301 Jeep Wrangler JL Rear Bumper with Tire Carrier or RH-90300 Jeep Wrangler JL Rear Bumper without Tire Carrier or our RH-90340 Aluminum Jeep Wrangler JL Rear Bumper without Tire Carrier weighing in at 40 lbs.

Skid Plate Weight: 32 lbs

Unique Design
Proven by the most hardcore Jeep JL drivers on trails like the Rubicon, Moab, Rausch Creek and more, our skid plate system's design is the key to it's popularity.

Our system is cut and formed from a single sheet making it smooth and seamless. This gives you a true skid plate without rock catching and high centering flaws found in low-budget alternatives.

Our skid plate system is the industry standard because of the confidence it instills in each and every customer. Each skid is laser cut from 1/4" thick aluminum coated in our weather and debris resistant powder coat finish. Strength is proven on virtually all Jeep enthusiast forums with glowing reviews. Since 2007 our skid plate system has been the undisputed leader in undercarriage protection.

What comes in every kit:
  • DEF / Muffler Skid Plate
  • Support Brackets
  • Hardware
  • Installation Instructions

Three Reasons Why:
  • Protects Muffler
  • 1/4" thick plate aluminum
  • Unmatched quality and fitment

Does this work with factory rear plastic or steel bumper?

Do I experience any driveline vibration or noise?

No. DEF / Muffler Skid Plates mounts away from all driveline components giving you factory like performance. You'd never know the skid was even installed!

Is any welding required?
No. Our mounting method allows for a DIY no-weld, truly bolt-in install.

What finish is available?
Rock Hard 4x4 skid plates ship powder coated black with a semi-smooth, semi-gloss finish.

Where is this mount made?
This product, like all RH4x4 parts, was designed, developed, tested, manufactured, and if applicable, powder coated, and shipped in the USA. And we don't mean the 75% legal standard to be able to say Made in USA. We are 100% Made in the United States of America!

Please click the image to download.
Product: Lifetime
Coating (if applicable): Due to varying climates and individual use, we cannot offer a warranty on powdercoating.


Average Customer Review:
( 2 )
Jack Sheahan from Bakersfield CA
June 20, 2022
If installing the skid plate over the DEF tank AND you have the Rockhard rear bumper, it will be easier down the road if you ever need to remove that skid plate to cut access slots in the bumper where the two flanges attach. Otherwise you will need to remove the bumper and tire carrier (if installed) just to get at two bolts. You cannot just drill two holes as there is not enough room to slid the
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Antonio Ortega from san diego, CA United States
August 5, 2019
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