How to Avoid These 5 Most Common Mud Flap Installation Mistakes

We see 'em all the time — here’s how to get it right the first time.

Installing a set of mud flaps or splash guards isn’t rocket science — but there are definitely a few spots where things can go sideways. At RokBlokz, we’ve shipped out thousands of mud flap kits for everything from WRXs to Tacomas to side-by-sides. So yeah, we’ve seen just about every install mistake in the book.

But don’t worry — we’re not here to roast anyone. If you’ve made one of these mistakes (or two, or five), you’re in good company. Let’s walk through the most common mud flap install problems we see, explain what’s actually going wrong, and show you how to fix it so your flaps do what they’re built to do: protect your ride and look damn good doing it.

What You’ll Find in This Blog:

• Installing a Mud Flap Too High or Too Low

• Skipping or Swapping the Hardware

• Mixing Up Left/Right or Front/Rear Flaps

• Overtightening the Screws

• Not Checking Tire Clearance

• RokBlokz Universal Kits vs. Vehicle-Specific Fit

• Final Thoughts on Fit & Function

• Frequently Asked Questions

1. Installing a Mud Flap Too High or Too Low

The Mistake:

Some folks mount generic mud flaps way too far into the wheel well or they hang them super low thinking “more coverage = more protection.” That might make sense if you're used to wrestling with cheap, universal mud flaps... but with RokBlokz? That’s not how these are built to fit.

Why It Happens:

Here’s the thing: most of the flaps on the market are one-size-fits-none. They’re cheap universal flat rubber or plastic sheets that require you to cut down, bend, drill, and guess your way through.                                                                                                                     
RokBlokz are CNC laser-cut specifically for your year, make, model, and trim. The shape, size, and mounting points are engineered for your specific vehicle — so trying to "adjust" them too much ends up working against the design. No need for cutting, bending, or trimming.

The Fix:

With RokBlokz, just use the included instructions or scan the QR code included in the kit for a step-by-step instructional video for your specific vehicle. No need to reinvent the fit — we’ve already dialed it in through engineering and testing.

Pro Tip: Before tightening everything down, step back and eyeball it from a few angles. If it looks off, it probably is. A quick adjustment now saves a lot of trouble down the road.

2. Skipping or Swapping the Hardware

The Mistake:

Reusing factory screws or forgetting a spacer might seem harmless — until your mud flap is sitting at a weird angle, loose, or worse, ripping into your liner.

How We Spot It:

We see generic mud flaps that are warped, twisted, or pressed up tight against the vehicle body. Or the wrong hardware causes damage to plastic fender liners or painted surfaces.

The Fix:

Always use the included hardware in the kit. Each RokBlokz set includes vehicle-specific brackets (if necessary), clips, spacers, screws, and more that are tested for proper clearance and a secure hold of the mud flap.

If something doesn’t line up or feel right, double-check the instructions. And if you're still unsure, hit us up — we’ll walk you through it.

3. Mixing Up Left/Right or Front/Rear Flaps

The Mistake:

You grab a mud flap, slap it on... and realize the logo’s facing inward, or the curves don’t match the wheel well. That’s not just a cosmetic issue — it can mess with fit and function too.

How We Spot It:

Wrong direction logos are an easy giveaway. Or we see gaps where the mud flap doesn't sit flush with the fender — especially around the lower corners.

The Fix:

Dry-fit before installing. All of our vehicle-specific mud flaps are labeled (F = Front, R = Rear, L = Left/Driver, R = Right/Passenger).                                                                              
Because ours aren’t universal — they’re designed for a perfect fit — orientation really matters. Don’t guess. It only takes a second to check, and it’ll save you a reinstall.

4. Overtightening the Screws

The Mistake:

This one’s sneaky — people assume tighter is better. But if you’re cranking the screws too hard, especially into plastic or painted fenders, you can crack the liner, strip threads, or deform the mounting surface. Tighten just to a gentle snug and that’ll do.

How We Spot It:

We’ll see stress cracks, stripped out screw holes, or the mud flap getting pulled way too tight into the body.

The Fix:

Snug is enough. All the hardware in your RokBlokz kit is selected for strength and hold — no need to overdo it.                                                                                                                 
If you’re using a drill or impact driver, set it to low torque or use a clutch setting. But we highly suggest simple hand tools for full control of the torque.

5. Not Checking Tire Clearance

The Mistake:

This one mostly hits lifted trucks, cars with wider tires, or lowered builds. You bolt the mud flap on, it looks clean... until you take a turn or flex off-road and hear it rubbing.

How We Spot It:

Rubbing marks on the flap, or reports of the mud flap getting yanked off after a hard turn or rough trail section. In some cases, we see deep grooves worn into the edge.

The Fix:

After install, turn the wheel to full lock both directions and check clearance. Do a bounce test if needed. If anything’s close, double check all installation steps and make sure it doesn’t rub. Have questions about your build? Get in touch with us before you order—we’re happy to help.

RokBlokz Universal Kits

While the overwhelming majority of our kits are vehicle-specific — laser-measured and precision-cut — we do offer universal flap sets for custom builds or hard-to-find rigs. These come with flexible mounting options and the same ultra-durable material we use in all our flaps.

But if we make a kit for your exact vehicle? Use that. It’ll bolt up cleaner, look better, and hold stronger. Period. The hard work has already been done for you!

Bottom Line: It’s Not Just About Looks — It’s About Fit and Function

RokBlokz mud flaps and splash guards aren’t some off-the-shelf rubber rectangles. These are purpose-built for real drivers who want real protection. But they only work as well as they’re installed.

Avoiding the above five install mistakes will result in:

• No rubbing or scraping
  

• No gaps or twisted flaps
  

• No cracked liners or stripped bolts
  

• Just clean, functional protection that looks great too
  
  

Need Mud Flaps? We’ve Got You

Ditch your generic, boring, basic mud flaps and get high quality protection. Every RokBlokz kit includes detailed instructions and access to video install guides. If something feels off or you’re stuck on a step, reach out — seriously. We’re here to help, and we want your install to be spot-on.

Got a clean install you want to show off? Send us your photos! We love highlighting customer rides on our socials.

Ready to find the right mud flap or splash guard kit for your ride? Click HERE to start shopping.

Frequently Asked Questions

Q: Do I need to drill holes to install RokBlokz mud flaps?

A: In most cases, no. The majority of our vehicle-specific kits are designed to use factory OEM mounting points — no drilling required. If drilling is needed for a particular model, we’ll call it out in the instructions and video. We make it as easy and straightforward as possible.

Q: How do I know if I received the right flaps for my vehicle?

A: Each flap is labeled (F/R for front/rear, L/R for driver/passenger side), and your kit should match your vehicle’s year, make, model, and trim. If something seems off — shape, size, or hardware — double-check the label on the packaging or shoot us a message. We’ll get it sorted fast.

Q: Can I use power tools to install these?

A: You can, but we don’t recommend it unless you’re using a low-torque setting or a clutch. Overtightening with a drill or impact gun is one of the most common install mistakes and can strip threads or damage plastic liners. A simple hand tool gets the job done safely and gives you more control.

Q: What if my tires are rubbing the mud flaps?

A: This usually happens with larger aftermarket tires, lift kits, or lowered suspensions. Turn the wheel to full lock in both directions and check for clearance. Do a lot of research and measurement before making your mud flap purchase. If you have any doubt or just have a question, get in touch with us. We’re happy to help!

Q: What makes RokBlokz different from cheap universal mud flap companies?

A: RokBlokz mud flaps are CNC laser-cut for specific vehicles. That means no trimming, no guesswork, and no sloppy fit. Plus, we use a proprietary poly-blend material that stays flexible without flapping around — even in harsh temps. Cheaper flaps sag, crack, or fall off. Ours stay solid for years.

Q: Can I install RokBlokz flaps by myself, or do I need a shop to do it?

A: Most people install our flaps at home with basic tools. If you can handle a screwdriver and other basic tools, you’re good to go. It’s that easy! Each mud flap kit comes with printed instructions and a QR code linking to install videos for your exact vehicle. Still stuck? Contact us — we’re happy to help.