Billetworkz - Dedicated to the Enthusiast
Made in USA, Weighted Feel, Custom Fitment
Upgrade Your Ride, Elevate Your Drive

FREE Shipping on Orders Over $150*

  • MatteBlackSTICap_1

Billetworkz Subaru STI SI-Drive Knob Cap - Customize Your Own

Billetworkz Subaru STI SI-Drive Knob Cap - Customize Your Own

$55.00
$55.00
Shipping calculated at checkout.

Transform your Subaru STI’s interior with the Billetworkz Custom SI-Drive Cap – a direct replacement for your factory button cover that combines premium quality with a look that’s uniquely yours.

Designed for STI models equipped with Subaru’s SI-Drive system, each cap is precision CNC-machined from billet aluminum and finished in durable coatings built to last.

What makes this version special? You can choose a Primary color and add a contrasting Splash color to create a bold accent that perfectly matches your build.

  • Direct replacement for OEM SI-Drive button cap
  • Precision CNC-machined from billet aluminum
  • Durable finish available in multiple colors
  • Installs easily – no special tools required
  • Compatible with Subaru STI models equipped with SI-Drive

Add a one-of-a-kind detail to your cabin and make your interior stand out with a custom accent built just for you.

Materials

In Progress - thanks for the understanding!

Specs

In Progress - thanks for the understanding!

Installation Guide

View Install Guides →

Access our step-by-step installation guides and install your Billetworkz products with confidence. Each guide provides clear instructions to ensure perfect fitment every time.

Processing Time

Most orders ship within 1–3 business days, but processing times can vary depending on inventory, color selection, and customization options.

Our Guarantee

Your satisfaction is important to us. Most standard items are eligible for returns within 15 days, and all Billetworkz products are backed by our Limited Lifetime Warranty.

See our full Refund Policy and Warranty Details for complete information.

Billetworkz Subaru STI SI-Drive Knob Cap - Customize Your Own

$55.00

Customer Reviews

Based on 6 reviews
83%
(5)
0%
(0)
17%
(1)
0%
(0)
0%
(0)
N
Nai Vang
Looks nice, but price could of been a little friendlier.

It's definitely very expensive for such a small little cap that just sits on top of the factory button. It's definitely very nice looking. It's just very expensive for a cap.

R
Rachel Moore
Install is a breeze!

Love this simple mod! Install takes 30 seconds - all you have to do is remove the adhesive backing and slap it on over the existing SI control knob. I've had the SI cap on my car for ~1 year and it has stayed put with no issues. Great product to upgrade the look of the interior.

User picture
D
Domingo Montilla
Juts beautiful

It looks amazing

User picture
T
Tyler P
Black SI drive cap w/ STI engraving a very nice touch to interior

Have been getting all of the silver out of my interior and the black SI drive cap with the STI laser engraving looks very crisp while keeping the black theme

a
ashley low
Beautiful piece

Just what I was looking for to match the HVAC dials and my shift knob. Turned out great and had the STi icon engraved. No fitment issues at all. Thanks!

B
Brandon S
Looks great!

Had some initial issues with the fit, but after a very quick email exchange my concerns were addressed and the cover was installed. On a Saturday no less! Thanks for the help Austin