aqf23

Member
First Name
Alvaro
Joined
Oct 19, 2025
Threads
2
Messages
5
Reaction score
15
Location
Basque Country, Spain
Vehicle(s)
FL5 CW
Hi everyone,

Like many of you, I noticed that the open vents on the FL5 front fenders are a magnet for road debris. The tires throw rocks right through them, causing potential damage to the side panels. While high-end performance cars usually have mesh in these areas, our FL5s were left open.

I decided to fix this. I started with a design from Thingiverse, but I wasn't satisfied with the fitment. 7 physical iterations later, I’ve achieved what I consider an "OEM-level" fit that meets my standards.

The Design Challenge: The typical flat guards you find online don't account for the complex geometry of the fender hole. If you look closely, there is a 3mm step at the bottom clip and a weird lip near the top. My design includes a custom cutout and offset to ensure the guard sits perfectly flush without stressing the clips or leaving gaps.

Material & Print Specs:
  • Final Version: Printed in ColorFabb HT Black. It’s my go-to for automotive parts—superior to ASA, incredibly durable, and handles high temps perfectly.
  • Mesh: Hexagonal pattern with 2mm thickness and 1.2mm walls (optimized for 0.4mm or 0.6mm nozzles).
  • Prototypes: I tested PLA versions on casual rides and they held up surprisingly well, so PETG/ASA should be more than enough.
CRITICAL INSTALLATION TIP: The Clips If you try to remove the OEM clips from the fender rubber, THEY WILL BREAK. It doesn't matter how much experience or tools you have; they are extremely brittle and not designed for reuse.
  • Honda Part Code: 91512-SX0-003
  • Advice: Buy a handful of these on AliExpress or from your dealer before you start. Just break the old ones, install the guard, and use the new clips.
Instructions: I’ve linked a video from ALPLUS aero vent installation bellow. It’s a great visual guide for the install. You'll need to remove 2 clips (around the vent), 2 bolts behind the hole, and the bolts under the car for better access.


11th Gen Honda Civic FL5 DIY: Precision Fender Vent Guards (Stop the rock chips! - 3D Printable) UltiMaker-Cura_5mT95C1him




Download Link: https://www.printables.com/model/1551396-honda-civic-type-r-fl5-oem-precision-fender-vent-g

I’m sharing this for the community so you can protect your paint without spending a fortune on commercial kits that might not fit as precisely as this.

Enjoy!
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