Product Description

FRONT INNER FENDER GUARDS - RZR
- Strongest inner fender protection available
- Mounts to frame using heavy-duty steel clamps for superior strength
- Exclusive full-coverage design - No hazardous openings on bottom
- Designed to deflect sticks* away from the passenger compartment without intrusion.
- Protects plastic inner fenders and front of floor boards
- Contoured to fit tightly with plastics for maximum tire clearance
- Strong aircraft-grade aluminum construction
- Thunderhawk is the ONLY inner fender guard to pass rigorous U.S. Military testing
- Protect your RZR with the same product used by the U.S. Marine Corps
- Precision CNC manufactured in the USA
* Generally speaking, a stick would be considered a dead tree branch that has fallen and is less than 1 1/2" diameter. Military testing does not guarantee that everything you encounter, in every situation, will be stopped by inner fender guards.

A surprising number of people have had a stick* break right through the plastic floor of their RZR. The front tire is constantly throwing everything against the plastic floor and inner fenders. Usually, this trail debris just bounces off, but occasionally a stick* will hit the wrong way and something has to give. When a stick breaks through the plastic and comes flying up right under your feet and legs, this will surely grab your attention.
SUPERIOR INNER FENDER PROTECTION
Thunderhawk Performance Inner Fender Guards are designed to protect the inner fenders & floorboards of the RZR's passenger compartment by stopping and deflecting sticks*. Thunderhawk's full-coverage design includes our exclusive lower cover plate that runs rearward, under the RZR, from the large protection panel that's visible in the wheel opening. This lower panel is mounted to the diagonal frame tube (located just below your feet) with heavy-duty steel clamps and completely closes off this large gap that is left open by other guards.
STRONGEST CONSTRUCTION & DIRECT FRAME MOUNTING
Thunderhawk Performance selected aircraft-grade aluminum for these inner fender guards and mounted them directly to the frame at multiple points for optimum strength and light weight. Heavy-duty steel mounting clamps are used, which have proven superior to drilling the frame for many small mounting screws. Thunderhawk guards are NOT mounted to the brake master cylinder (like others) - Seriously, who mounts a guard like this to the brake system?
WHY CHOOSE THUNDERHAWK PERFORMANCE ?
Thunderhawk Performance was awarded a U. S. Military contract to equip the MRZR with Thunderhawk Inner Fender Guards. This was an unsolicited contract, which was awarded after the U.S. Marines purchased many different inner fender protection products from various companies and put all of these products through rigorous testing. The Thunderhawk Performance Inner Fender Guards were the ONLY ones to pass this testing.
So, how did they test it? An RZR was equipped with guide wheels to allow it travel along a set of railroad tracks at speeds up to 35 miles per hour. Sharpened hardwood dowels, up to 2 inch diameter, were mounted to a plate between the rails at four locations and two different angles so that they would impact the floor board behind the front wheels. You can see photos above.
With over 20 years serving the side-by-side UTV community, there are many other great reasons to buy Thunderhawk Performance products. It's probably easiest to START HERE for answers to the most common questions, or feel free to give us a call anytime to learn everything you want to know.
DISCLAIMER: A stick*, rock, limb, log, or other trail debris can come up from any angle, can be any size, and can be hit at any speed of which these machines are capable. The driver should always be aware of trail conditions & maintain a safe speed for the conditions. Always drive carefully, avoid potentially hazardous trail debris and proceed slowly & cautiously where hazardous debris may be concealed (such as under leaves, ground cover foliage, snow, or below the surface of water (such as a puddle or creek). Thunderhawk Performance, Inc. is not responsible for any damage to property, life or limb, and the buyer assumes full responsibility and liability for, any and all damage or injury of any kind, including death.
Fitment and Installation
FITS :
- 2014 - 2023 Polaris RZR XP 1000
- 2014 - 2023 Polaris RZR XP-4 1000
- 2016 - 2021 Polaris RZR XP Turbo
- 2016 - 2021 Polaris RZR XP-4 Turbo
- 2018 - 2021 Polaris RZR XP Turbo-S (+ $25.00)
- 2018 - 2021 Polaris RZR XP-4 Turbo-S (+ $25.00)
- 2015 - 2020 Polaris RZR 900
- 2015 - 2017 Polaris RZR 900 XC
- 2015 - 2020 Polaris RZR-S 900
- 2015 - 2018 Polaris RZR-S 900 - 4 Seat
- 2016 - 2020 Polaris RZR-S 1000
- 2019 - 2020 Polaris RZR-S 1000 - 4 Seat
- 2021 & newer Polaris RZR Trail 900
- 2021 - 2025 Polaris RZR Trail-S 900
- 2021 & newer Polaris RZR Trail-S 1000
SPECIAL FITMENT NOTES
- May not fit RZR Trail 900 (50" wide) models with larger tires - This kit reduces tire clearance by less than 1/2"
- RZR's equipped with aftermarket UHMW skid plates will need to:
- 1. At a minimum, loosen the front edge of the skid plate (along the
diagonal frame tube) to allow for installation of this kit
2. May need to remove some bolts at the front edge of the skid plate and along the rocker panel in order to pull it down to access the diagonal frame tube
3. If equipped, may need to trim some of the upward-bent front lip of the UHMW skid plate (if it rises above the top of the diagonal frame tube)
4. Allow extra time for installation to fit this kit with aftermarket skid plates - Our instructions include a section with general notes and diagrams to assist when installing this kit with aftermarket UHMW skid plates. Unfortunately, there are simply too many variations in design & construction between all of these UHMW skid plates for us to provide exact details for the installation of this kit with every possible brand of skid plate.
COMPLETE KIT
- Includes all necessary hardware and illustrated step-by-step instructions
- Installs easily in about 90 minutes
INSTALLATION INSTRUCTIONS
CA Warning: Cancer or Reproductive Harm Prop 65
Product Videos
Custom Field
Product Reviews
11 Reviews Hide Reviews Show Reviews
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Inner fender guard
AAA+++ Great fit easy install
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Inner fender Guard
My friend bought these for his rzr is why I bought they look good and give you the added protection you need at a reasonable price. My friend is very knowledgeable with various products we all purchase in our group he does the research so we don't have to. It's a good investment
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Inner fender firewall guards.
Fit perfect. Tough material. Looks nice as well.
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Wheel well, guards
installation we very well thought out. Engineering of the piece. Excellent quality.!
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Very solid, simple install
Solid piece of metal, fit prefect on my 2017 polaris rzr turbo. Much better piece of mind when driving through trails in Missouri.
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Great fit and look
Install was simple. Very sturdy
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Easy and functional
This was the first upgrade I made to my rig as soon as I got it. Super easy to install even with an aftermarket skid plate. The second side goes a lot faster after learning from the first. I would recommend this to anyone looking to add an element of safety to your riding adventures.
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Excellent
No issues
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THUNDERHAWK PERFORMANCE INNER FENDER GUARD KIT; FRONT
Great fit and super easy install!