Top 10 Must-Have Accessories for Your Subaru STI

When it comes to customizing your Subaru STI, the possibilities are as thrilling as the car itself. Imagine turning every head on the street, upgrading your drives with practical enhancements, and adding the kind of flair that screams personality.

The key to achieving this starts with WRXDaily’s list of must-have accessories for your Subaru STI. Your vehicle will go from impressive to unforgettable. We’re here to fuel your passion for personalization with a lineup of stylish, functional, and downright exciting upgrades. Your dream STI build starts now!

Cat-back Exhaust System

Few upgrades deliver a thrill quite like a high-quality catback exhaust system. By replacing your stock exhaust, you’ll improve performance, enhance the sound, and get a more aggressive look. Here are three standout options to consider:

• AWE Tuning Track Edition: Known for its raw, aggressive tone, the AWE Tuning Track Edition exhaust helps reduce backpressure while delivering a sound that will turn heads on every corner.
• Invidia R400: Featuring a quad-tip design, this is an impeccably crafted system that combines performance with an exotic tone. Its stainless-steel build ensures long-term durability.
• Tomei Expreme Ti: Made from titanium, the Tomei Expreme Ti system is lightweight and produces a clean, high-pitched racing sound that Subaru fans love.

2. Adjustable Coilovers

Adjustable coilovers are a game-changer for improving cornering performance and dialing in your ride height. Whether you’re cruising the streets or tracking your car, these options provide optimal handling:

• BC Racing BR Series: Offers a wide range of adjustability and a smooth ride, making it a versatile option for both daily driving and spirited driving.
• Fortune Auto 500: These coilovers were developed with the racetrack in mind. Experience quality all-around shock absorption that optimizes comfort and reliability.
• Tein Flex Z: Known for their affordability without compromising quality, Tein Flex Z coilovers are a favorite for Subaru enthusiasts looking to improve suspension performance.

3. Performance Wheels

One of the most dramatic ways to customize your Subaru STI is by upgrading its wheels. Performance-focused wheels can reduce weight, enhance traction, and improve handling. With countless designs and finishes available, upgraded wheels allow you to make a bold statement every time you hit the road.

• Enkei NT03: With a distinctive racing design, these wheels are lightweight yet durable, making them perfect for track and street use.
• Work Emotion ZR10: These sleek and stylish alloys boost your car's aesthetics while maintaining strength and performance.
• Work Emotion D9R: Known for their timeless design, these wheels offer the perfect mix of function and form.

4. IDoing Head Unit

The Subaru STI comes with a functional infotainment system, but upgrading it can significantly enhance your in-car experience. WRXDaily’s IDoing head unit comes equipped with larger touchscreens, better user interfaces, Apple CarPlay, and Android Auto compatibility. These upgrades make navigating, streaming music, and staying connected effortless.

If you’re someone who spends a lot of time in your STI, this upgrade will make every drive more enjoyable by delivering high-quality entertainment and seamless access to your favorite apps.

5. Air Oil Separator

Preventing oil buildup in the intake system is critical for long-term engine reliability, especially if you’re pushing your STI hard. Air oil separators ensure cleaner airflow and better performance. Here are our top picks:

• IAG: A trusted name in Subaru upgrades, IAG’s air oil separator is a go-to option for reliable performance and ease of installation.
• COBB: Known for its premium build quality, COBB’s unit not only protects your engine but also minimizes maintenance over time.
• Perrin: A sleek, functional option that's easy to install and perfect for STI owners looking for long-term dependability.

6. Cold Air Intake

Enhance your engine's breathing ability with a cold air intake system. This upgrade helps improve airflow, resulting in increased horsepower and torque. Consider these options:

• Perrin: Designed specifically for the Subaru STI, it provides optimal airflow while maintaining safe air-fuel ratios.
• COBB: With its precision engineering, COBB’s cold air intake system delivers consistent performance gains.
• GrimmSpeed: Known for its high-quality construction, GrimmSpeed's intake performs well and looks stunning under the hood.

7. COBB Accessport

The COBB Accessport is a must-have for unlocking your Subaru STI's full potential. It’s an all-in-one tuning device that allows you to monitor performance data, flash performance maps, and refine your tune for maximum output. Whether you're performing light mods or significant upgrades, the Accessport is an essential tool for optimizing your setup.

8. Short-Throw Shifter

A small accessory like a short-throw shift knob can have a surprisingly big impact on your driving experience. It provides a sportier, more precise shift feel, giving you better control during spirited driving. Here are some worthy options available at WRXDaily:

• Boomba: A robust, precision-engineered shifter that reduces shift travel for smoother and quicker gear changes.
• COBB: Known for its high-quality build, COBB’s short-throw shifter provides a clean, responsive shifting experience.

9. Upgraded Speaker System

If you're a music lover, upgrading your car's sound system is non-negotiable. The factory speakers in the Subaru STI do their job, but an aftermarket audio system can transform your driving soundtrack. Whether you're an audiophile or just want better sound on the go, the following upgrades are worth considering:

• Subaru OEM Kicker Speaker Upgrade Kit: Enjoy crisp, clear audio with better sound reproduction across the spectrum.
• Subaru OEM Kicker Tweeter Upgrade Kit: These tweeters enhance the clarity of high frequencies, making every note crystal clear.
• Subaru OEM Kicker Subwoofer Upgrade Kit: Elevate your audio experience with deep, rich bass.

10. Upgraded Downpipe

For STI owners chasing significant power gains, an upgraded downpipe is a must. It improves exhaust flow, which enhances both torque and horsepower. Here are two excellent options:

• ETS (Extreme Turbo Systems): This downpipe is crafted for high performance and helps you maximize output, especially when combined with a tune.
• Invidia: Known for its excellent craftsmanship, the Invidia downpipe provides a noticeable improvement in sound and performance.

WRXDaily's Subaru STI Accessories

At WRXDaily, we understand that your Subaru STI should feel as unique as you are. That’s why we offer a wide range of accessories to help you customize your vehicle to match your style and driving needs.

From performance upgrades to aesthetic enhancements, our Subaru STI accessories are designed to make your Subaru truly unique. With our commitment to quality and customer satisfaction, you can trust WRXDaily to help bring your vision to life.

The Subaru STI is already an outstanding car, but choosing the right upgrades can take it to the next level. These must-have accessories for your Subaru STI ensure you’ll drive with unmatched style, performance, and comfort.

Explore the world of aftermarket parts and discover how each enhancement brings unique benefits to your ride. Whether you're aiming for aesthetic refinement or improving functionality, there’s no shortage of options to make your STI uniquely yours.

What's your first must-have upgrade?