Looking to bolt on some serious downforce? These five US shops are crafting splitters and diffusers that'll transform your ride's stance and stability.
The Custom Aero Landscape
The aftermarket aero world has exploded beyond universal eBay lips. Today, you can get CNC-machined splitters, carbon fiber diffusers, and side skirts tailored to your exact car model—or even custom-made from scratch. Shops range from budget-friendly DIY kits to full carbon race-spec pieces, and many offer in-house installation. Whether you drive a Civic or a Supra, there's a splitter out there with your name on it. The key is finding a builder that matches your goals, budget, and patience for lead times.
How We Evaluated
We looked at each shop's product range, pricing transparency, customization options, and whether they offer installation or just parts. We also considered how well they serve the DIY crowd versus those wanting a turnkey solution. Each business brings something different to the table, and we've highlighted what stood out for each.
Here's a quick snapshot of the five shops we're diving into, from budget-friendly to full carbon.
| Provider | Best For |
|---|---|
| Racebred Components | Track-day warriors needing durable, replaceable splitters |
| Home - Gorilla Splitters | Affordable custom splitters with professional installation in Tucson |
| Zebulon Motorsport | Carbon fiber connoisseurs and serious racers |
| EzSplitters | Budget builds with a wide range of color options |
| Ventus Autoworks | Budget side splitters with tons of size options |
The Shops, Up Close
#1 Racebred Components
A screenshot of the Racebred Components website.
Racebred Components is a California-based shop that's all about function-first aero. Their custom front splitter blades start at $449 and are CNC-cut from 1/2-inch resin-impregnated birch—strong, stiff, and wear-resistant. You can order up to 79x30 inches, and they'll even cut diffuser tunnels if you want. They're a solid pick if you're tracking your car and need something that can take a beating. The made-to-order lead time is 6-8 weeks, so plan ahead. If you're local to Placentia, CA, you can pick up oversized pieces in person.
#2 Home - Gorilla Splitters
A screenshot of the Home - Gorilla Splitters website.
Gorilla Splitters, based in Tucson, Arizona, is all about making custom aero accessible to everyone. They offer front splitters, side splitters, and diffusers for a wide range of cars—from Honda Civics to Toyota Supras—with most pieces priced at $350 or $400. What sets them apart is their in-house installation service, so you can have your new aero fitted by their team. They also run a deal where orders over $500 get a free T-shirt, which is a nice touch. If you're in the Southwest and want a custom look without the hassle of DIY, this is your spot. Their mission is literally to deliver custom aerodynamics to every ride possible.
#3 Zebulon Motorsport
A screenshot of the Zebulon Motorsport website.
Zebulon Motorsport is the high-end option, hand-crafting carbon fiber splitters in the USA. Their custom front splitters start at $2,085, but you're getting race-grade composite work with options like end fences, tunnels, and even multi-element time attack designs. They also offer trackside engineering support, so this is a shop that understands aero at a deeper level. If you're building a serious track machine or just want the best carbon fiber money can buy, Zebulon delivers. Expect a premium price and a product that's as much art as it is function. They're based in the US and ship worldwide.
#4 EzSplitters
A screenshot of the EzSplitters website.
EzSplitters is the budget-friendly king, with custom front splitters starting at just $220 (down from $275). They offer a ton of color options for the splitter itself and the edge strip, plus add-ons like winglets and splitter rods. The catch? You need to email them before ordering to discuss your car—they'll cancel orders placed without prior contact. That's a bit of a hurdle, but it ensures you get the right fit. They're CNC machined in the USA and cover a huge range of makes and models. If you're on a tight budget and don't mind a little back-and-forth, this is a great starting point.
#5 Ventus Autoworks
A screenshot of the Ventus Autoworks website.
Ventus Autoworks specializes in custom side splitters, starting at just $169.99. They offer a huge range of length options (from 60 to 88 inches) and finishes like gloss black or carbon fiber vinyl wrap. You can also add flared ends or winglet fins to dial in the look. They ship free across the US and Canada, which is a nice bonus. The catch is that custom orders are non-refundable, so you need to measure carefully. If you're looking for a cheap way to add some aggression to your side skirts, this is a solid pick. They also carry front splitters and rear diffusers if you want to complete the package.
How to Choose Your Aero Shop
First, figure out your budget and what you're willing to spend. If you're on a tight budget, EzSplitters or Ventus Autoworks are great starting points. If you want carbon fiber and don't mind paying for it, Zebulon is your guy. Next, consider whether you'll install the parts yourself or want a shop to do it—Gorilla Splitters offers in-house installation, which is a huge plus if you're not handy with a wrench. Also, think about lead times: Racebred and Zebulon have longer waits, while others might be quicker. Finally, check if they offer the specific product you need—some specialize in front splitters, others in side splitters. Match the shop to your car and your goals.
Streamlining Your Aero Purchase
Once you've picked a shop, the process is pretty straightforward. Most sites let you configure your splitter online—choose your car model, size, and finish. For custom pieces, you'll often need to email or call to confirm details. After ordering, you'll wait for production, which can range from a few days to a few weeks. If you're getting installation, book an appointment ahead of time. And don't forget to check for deals—Gorilla Splitters throws in a free T-shirt on orders over $500.
The Bottom Line
No matter which shop you choose, you're getting a product that's a step above generic factory plastic. From budget-friendly options to full carbon race pieces, there's something for every build and budget. The key is to know what you want and plan ahead for lead times. Whether you're in Tucson and want a pro install or you're a DIYer ordering online, these five shops have you covered. Go get that downforce.