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Ford Super Duty Fuse Box Water Deflector (2020+)

Ford Super Duty Fuse Box Water Deflector (2020+)

$35.00
Version
✓ Free Shipping ✓ Made in Louisiana

64 reviews

What's Included Basic – $35 Pro – $55
Passenger Side Deflector ✓ ✓
15" Drain Hose w/ Clamp — ✓
Cowl Dam — ✓
Retention Thumb Screw — ✓

 

NOW COMPATIBLE WITH 2020 AND NEWER SUPER DUTY TRUCKS

A Known Problem. Now There's an Affordable Fix.

Water infiltration near the battery junction box is a documented issue on Super Duty's. The factory design routes water directly over the battery junction box, and eventually that catches up with your electrical system.

Our water deflector snaps into the existing drainage plate and actively redirects water away from the junction box, routing it safely down the side of the engine compartment instead of onto your electrical components.

No tools. No hardware No drilling. No permanent modifications. Installs and removes in seconds.

Built to last: Printed in-house from black ASA. UV-stable, high-strength, and built to handle engine bay heat, moisture, and under-hood conditions long term.

Fits: 2020+ Ford F-250, F-350, and F-450 Super Duty.

Disclosures

Water Deflector - Liability Disclaimer

Important:This deflector is designed to reduce water exposure near the battery junction box under normal driving conditions. It is not a waterproof seal and is not a substitute for diagnosing or repairing existing water intrusion issues. Function First Design is not responsible for electrical damage resulting from water infiltration, pre-existing conditions, improper installation, or use outside of intended applications. Inspect your engine bay regularly and address any existing moisture concerns before installation.

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  • 5 stars: 63 (98%)
  • 4 stars: 1 (2%)
  • 3 stars: 0 (0%)
  • 2 stars: 0 (0%)
  • 1 star: 0 (0%)
D
D.S.

Great people, awesome designs! Any water that made it down the cowl was safely directed away from the BJB and down the tube to the fender liner. Ford made a similar widget standard on the 27’s but left us older trucks hanging. Thanks to FFD for picking up their slack!

A
Anonymous

Fits better than the factory Ford piece at 1/3 of the cost. Would 100% recommend and but again.

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Kent J.

Received my Pro water deflector today and just finished installation. It's very well made and sturdy as well. It fit perfectly and should do a good job at keeping the water off the top of the fuse box. I really like the included T bolt and cowl deflector that is included with this model, as well as the drain hose. Really well thought out product and definitely outdoes what Ford came up w ith for a fix. Thank you for excellent service and a quality product!

S
Scott C.

Appears to be well made and easy to install. Hopefully it keeps water off the BJB.

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James P.

Exact fit and well made. Time will tell if the material will hold up to the engine bay, but I am extremely pleased with the fit and function. Price is right and shipping is quick.

Note: I used a strip of silicone made for showers as a dam to help direct water into the deflector.

L
Lawrence T.

Stan went the extra mile to make me a custom water deflector for my beloved Double Deuce. Thank you, brother. Great product and great service. I highly recommend Function First Design to create your 3D needs!

C
CASEY H.

Awesome design. Perfect fit. Install time was about 15 seconds!

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Brian

Just installed this on my 26 Super Duty. Takes longer to unlock the doors, pull the hood lever and go open the hood than to install it! Fits great, quick service and looks like it belongs under the hood.

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Todd S.

Great design for a fix on a common problem with Ford trucks! Fast shipping too!

K
Kevin

Fantastic product. Fit like a glove on my 2024 F350 Platinum 7.3.

L
Lawrence G.

Awesome design and very high quality material. Fit and finish is fantastic. Highly recommend!

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Andrew B.

I like the Pro version with drain tube and water diverter. Install takes 2min.

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Jerry W.

Great part. It should drain water below the fuse box. Took all of two minutes to install.

A
Anonymous

Looks great and appears to be very good quality. Best kit I have found and reasonably priced in my opinion.

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Thomas B.

Awesome fit & finish. It installed in my 2025 Superduty in less than 5 minutes. It looks like it came from the factory with it installed. So much better than the Ford design!!! THANKS

A
Anonymous

As far as I can see, it's working as it should and was much cheaper and more robust than the OEM part that Ford made.

R
Ron K.

This thing fits perfect ! I am sure glad I bought this . I will give me piece of mind knowing that will keep the water out of the fuse box.

C
Chris J.

Great item. Packaged well and was very easy to install.

A
Anonymous

Well made part easy install

J
Jeffrey S.

It fit perfect and took only seconds to install. Great product and fast shipping.

G
Garry H.

Perfect fit.

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Edward l.

Went on fast and easy,fit well

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Michael D.

You’re perfectly.

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Mark M.

Great item made of high-quality materials. Would recommend this if you don't have this on your Rig.

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Tim E.

Works as advertised! Very happy with the form, function and fit.

C
Cliff H.

Fits perfectly

M
Mitch P.

Fast shipping, great communication. Fit and ease of installation was great.