Made in the USA | Custom Performance Parts | FREE Shipping on Orders $150+
Billetworkz Engine Bay Caps - Subaru WRX 2015-2021 & 2022+
Regular price
$220.00
Sale price
$220.00
Regular price
Unit price
per
Shipping calculated at checkout.
Tired of a boring engine bay? Upgrade instantly with Billetworkz Engine Bay Caps.
The Problem: Crusty, faded factory caps are ruining your engine bay's look.
The Solution: Upgrade to a Billetworkz Engine Bay Cap Set!
These are direct factory replacements—CNC machined from 6061 aluminum and finished with a durable, vibrant anodized finish, or powder coated depending on the color. They offer a flawless fit and a clean, custom aesthetic that truly sets your Subaru apart.
Ready to trash the plastic and install a premium billet upgrade? Do it today!
2015-2021 & 2022+ WRX includes:
- Oil Cap
- Wiper Fluid Cap
- Coolant Overflow Cap
- Brake Fluid Cap
Why Choose Billetworkz?
At Billetworkz, we pride ourselves on delivering top-tier automotive accessories that blend performance with aesthetics. Our Engine Bay Caps are a testament to our commitment to quality and design excellence.
Materials
Materials
Specs
Specs
Installation Guide
Installation Guide
Processing Time
Processing Time
Engine Bay Aesthetic — Custom Colors & Finish Options
Choose from a variety of colors and finishes to match — or accent — your build. Swap out faded plastic caps for a sleek, custom look that sets your engine bay apart.
OEM-Fit, Direct Replacement Caps
Replaces your stock fluid caps — oil, coolant, brake, washer, and more — with full billet aluminum caps that screw in or snap in just like factory parts. No modifications needed.
Functional & Clean — Form Without Sacrifice
These caps maintain OEM threads and fitment tolerances, so you get upgraded looks without compromising function or safety. A clean, cohesive engine bay that still works as intended.
High-quality engine bay caps praised for "exceptional" fit and finish. Customers said they add a "nice custom touch" and the "bright red works really well." Custom color options available. Easy installation, though one customer noted the coolant cap was "a bit too tight" requiring minor sanding. Oil fill cap markings may not align perfectly due to threading.
Some of the reviews shown are from related products the merchant grouped with this one.
J
Red
Ordered oil and wiper fluid caps in red, to match my front strut bar and battery tie down. Fit was perfect. I was leary of the press on fit of the wiper fluid cap, but it's on there tight and stayed on. Looks so much nicer than the OEM yellow plastic. And they are stronger.
C
Absolutely love the engine bay caps and the material used to make them. From the original plastic caps to fully colored caps, it truly makes an aesthetic difference. This company is very responsive and professional, too!
T
Manual / Blue
Had to ditch the ugly yellow plastic caps and Billetworks has the best look. Easy install with only momentary confusion over the membrane on the brake fluid cap.
A
Red Wrinkle
Purchased the wrinkle red engine bay caps with the matching dipstick. Quality is top-notch, and the install was very simple and easy to follow. HIGHLY recommend for sprucing up your engine bay from those nasty oem yellow caps.
M
Black
My 2024 Subaru Outback appreciates my new Billetworkz Engine Bay Caps.. They look great.
G
Red Wrinkle
Looks great. Brake fluid cap was a bit of a learning curve but wasn't too bad
M
Manual / Red Wrinkle
I bought these because they look good with artistic logo for each fluid type, and don't have "Billetworkz" all over each cap as an advertisement. Much appreciated!
Looks fantastic for reliving my 90s JDM street cars growing up. Red Powdercoat finish.
B
Manual / Red
Caps add a nice accent to the engine bay. Really love the way they look
W
Red Wrinkle
I just purchased the set of 5 caps in wrinkle red for my '19 WRX STI and they were very impressive. The material and the finish were outstanding, also very sturdy. I should have purchased the kit a long time ago. I'm very pleased with the product and the look.
C
Red
These caps look great, and the bright red (non wrinkle in my case) works really well against the rest of the engine compartment and the orange of my WRX. Don't mind that I added the Perrin oil filter cover (Billetworkz doesn't have one).
The only minor thing I would change - and it's small - is that the marking on the oil fill cap doesn't orient square to the markings on the other caps, which you can turn any way you want. It's because it's a threaded cap. My guess is it could be fixtured to square up better when it's marked. But it still looks great, I'm just a little OCD.
R
Red
Great craftsmanship, perfect fit!
B
Great quality product. Thick piece of metal and easy installation. Paired with the dipstick. You get what you pay for.
S
Manual / Blue
These really stand out within the engine bay. I bought the full kit with the dipstick and I’m very pleased. The washer fluid cap was a tough fit and the coolant cap was an easy on but very difficult to remove. So I used a heat gun on the rims of reservoirs for a minute then pushed the caps on. It kind of form fitted the caps and they are much easier to service.
J
Absolutely amazing product!!! I brought a complete set in Pink. They all fit perfectly with a tight fit. They are expensive but the the quality is outstanding and well worth it in my opinion. I have only just fitted then, so how they hold up over time is still yet to be seen but I'm sure there will be no issues.
They are great. Thank you Billetworkz for great products and service.
P
Black
Dimension color material engraving style dressing resistence details treatment ALL TOP
K
Red Wrinkle
Great service got my order quick after I got the email about it being shipped. Everything fits and looks amazing thank y’all for everything.
T
Red
High quality construction! Adds a nice touch to the engine bay for sure!
N
Hyper Pink
They're not exactly plug and play. You have to use the linings from the inside of some of the OEM caps which can take some effort to retrieve without harming. Patience and plyers. They look SO good. The pink is super bright and matches my radiator shroud exactly. You should absolutely get these!
j
Love them.
Definitely have duty feeling and love the look after install.
Here are Before and After.
Didn't use the oil cap because of the oil separator.
B
Red
These are beautiful and extremely well made. Well worth the price. Wiper cap is a little hard to get off but I figured it out. At least I know it won’t come off driving. Would definitely recommend and/or purchase again.
