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Billetworkz 4" Shift Knob Extender 2015-2024 WRX / 2004-2021 STI - BW-EXT-SUB6-4-BLK - Subimods.com

Billetworkz 4" Shift Knob Extender 2015-2024 WRX / 2004-2021 STI

$63.00
$70.00
$70.00 - $70.00
$70.00
$63.00 - $63.00
$63.00
-10% -10%
Only 2 Left In Stock! Usually Ships within 1-2 Business Days
Only 1 Left In Stock! Usually Ships within 1-2 Business Days
Only 1 Left In Stock! Usually Ships within 1-2 Business Days
Only 3 Left In Stock! Usually Ships within 1-2 Business Days
5 In Stock, Usually Ships within 1-2 Business Days
Only 1 Left In Stock! Usually Ships within 1-2 Business Days
SKU BW-EXT-SUB6-4-BLK
by Billetworkz
Lease to own Pay as low as $/week

DETAILS

Billetworkz 4" Shift Knob Extender 2015-2024 WRX / 2004-2021 STI | Ergonomic Shift Enhancement | Interior Accessories

Overview

The Billetworkz 4" Shift Knob Extender is a precision-crafted upgrade designed specifically for Subaru WRX and WRX STI models from 2015 to 2024 and 2004 to 2021, respectively. This extender raises the height of your factory shift knob, providing a more comfortable and natural shifting position. Ideal for enthusiasts who frequently drive spiritedly or track their car, this extender enhances driving ergonomics by reducing reach and improving leverage, resulting in smoother, more confident shifts. When paired with a short shifter, it offers a significant upgrade in shift feel and control, making every gear change more precise and enjoyable.

Built with a focus on quality and durability, Billetworkz’s approach combines CNC machining, meticulous polishing, and anodizing to produce a sleek, scratch-resistant finish that withstands daily use. The design ensures a perfect fit on 6-speed Subaru transmissions, including proper clearance for the factory reverse lockout, making installation straightforward and reliable. This product exemplifies Billetworkz’s dedication to crafting platform-specific parts that meet the needs of Subaru owners seeking both form and function.

For Subaru owners looking to improve their driving experience, this shift knob extender offers a practical solution that enhances control and comfort. Whether for daily commuting or aggressive driving, the increased shift height and improved leverage contribute to a more engaging and ergonomic cockpit. Elevate your Subaru’s interior with this high-quality billet accessory and enjoy a more refined shifting experience every time you get behind the wheel.

Features & Specifications

This Billetworkz shift knob extender is engineered for Subaru WRX and STI platforms and features a 4-inch extension to improve shift ergonomics. Constructed from CNC-machined aluminum, it delivers durability and a premium look for Subaru enthusiasts seeking a functional upgrade.

  • Brand: Billetworkz
  • Product: 4" Shift Knob Extender
  • Part Number: Not specified
  • Fitment: 2015-2024 WRX, 2004-2021 STI with 6-speed transmission
  • Material: CNC Machined Aluminum
  • Finish: Anodized, Polished
  • Construction: CNC Machined, Anodized Aluminum
  • Origin: Made in USA

Designed specifically for Subaru’s 6-speed transmissions, this extender maintains proper clearance for the reverse lockout mechanism, ensuring seamless operation. Its anodized finish provides scratch resistance and long-lasting durability, perfect for daily drivers and track enthusiasts alike.

Key Benefits

  • Enhanced Ergonomics: Raises the shift knob height for a more natural and comfortable shifting position, reducing driver fatigue during extended drives.
  • Improved Leverage: Provides better leverage for smoother, more precise gear changes, especially when paired with a short shifter.
  • Durable Construction: CNC-machined aluminum with anodized finish ensures longevity and resistance to scratches and daily wear.
  • Perfect Fitment: Designed specifically for Subaru WRX and STI models with 6-speed transmissions, including proper clearance for reverse lockout.
  • Easy Installation: Simple bolt-on design allows for quick installation without modifications, making it accessible for DIY enthusiasts.
  • Platform-Specific Design: Ensures compatibility and reliable performance tailored to Subaru’s shifting ergonomics.

What's Included

  • 1× Billetworkz 4" Shift Knob Extender
  • Mounting hardware (if applicable)
  • Installation instructions

Installation & Compatibility

Installing the Billetworkz 4" Shift Knob Extender is a straightforward process that can typically be completed with basic hand tools. It is a bolt-on upgrade that requires no modifications to your vehicle, making it suitable for DIY installation by Subaru enthusiasts. The extender fits 6-speed Subaru transmissions in WRX and STI models from 2015 to 2024 and 2004 to 2021, respectively. For optimal performance, pairing this extender with a short shifter is recommended to maximize shift feel and ergonomics.

While installation is generally DIY-friendly, professional installation is always an option if you prefer a guaranteed perfect fit. Verify your vehicle’s specific model and transmission configuration before installation to ensure compatibility. No tuning or additional modifications are required, making this a hassle-free upgrade for improving your Subaru’s interior ergonomics and shift control.

Shop with confidence at Subimods—your Subaru parts specialists.

Why Billetworkz? 

Billetworkz has become a go-to brand for Subaru owners who demand more than just performance—they demand personality. Proudly based in Pennsylvania, we’re a passionate crew of enthusiasts who live and breathe the automotive lifestyle. From the first prototype to the final polish, our parts reflect a deep understanding of what Subaru drivers truly want—function, feel, and a custom aesthetic that stands out. While other brands follow trends, Billetworkz carves its own path—earning the respect of some of the most detail-obsessed Subaru owners in the world.

Weighted Shift Knobs – Feel Every Shift 

For Subaru enthusiasts who demand more from every gear change, Billetworkz Weighted Shift knobs deliver the perfect balance of performance and style. Precision-machined from stainless steel, our knobs are designed to add weight where it matters—giving you smoother, more deliberate shifts and a connected driving experience. With dozens of finishes, engravings, and shapes like our popular Lightbulb, Piston, and Teardrop, there's a perfect knob for every build style—from daily driver to full send. Built in-house, made in small batches, and designed to feel as good as they look—this is where the shift starts.

The Subaru Modding Essentials 

We know the mod bug runs deep in the Subaru world; that’s why we built the essentials that elevate both form and function. Our Weighted Shift Knobs offer crisp, smooth and more connected shifts, while our engine bay caps and interior accessries clean up the bay and add that personal touch. Every part is machined from high-grade materials and built to last, designed specifically for your Subaru platform. Whether you're starting your first build or finishing off a full setup, Billetworkz makes sure the details never get overlooked.

Billetworkz Custom 

Transform your vehicle's interior with Billetworkz custom engraved shift knobs, meticulously crafted to your exact specifications. Our made-to-order shift knobs allow you to personalize every detail—from unique engravings and logos to custom colors and finishes. Experience truly personalized automotive craftsmanship with Billetworkz.

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About Billetworkz

About Billetworkz

At Billetworkz, every product is made in-house with Subaru drivers in mind. From Weighted Shift Knobs that improve your daily drive to Short Shifters that transform every gear change, our parts are crafted for those who crave precision and individuality behind the wheel. Whether you're building a show car or a weekend canyon carver, our Subaru-specific components, including engine bay dress-up kits and interior accessories, let you fine-tune every detail to your exact style. No outsourcing. No compromises. Just pure Subaru passion—machined into every piece.

Style & Innovation

Style & Innovation

Subaru builds deserve more than just bolt-ons—they deserve innovation you can feel and style that turns heads. At Billetworkz, we obsess over every cut, curve, and finish to bring bold ideas to life for the Subaru community. Our shift knobs and accessories don’t just add flair—they’re engineered to enhance form and function, elevating every drive. Trusted by Subaru enthusiasts, track rats, and custom-builders alike, we set the standard for creative, high-performance detail without ever sacrificing craftsmanship.

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