Stillen Performance Parts: Precision-Built Upgrades That Transform Your Ride
10th Feb 2026
For performance enthusiasts and custom builders, Stillen is a brand with deep roots in the automotive aftermarket — known for engineering high-quality parts that enhance the performance, sound, and driving feel of a wide range of vehicles. From exhaust systems and air intake upgrades to power modules and handling components, Stillen has been helping drivers achieve real-world results for decades.
Built with precision and durability in mind, Stillen parts are designed to improve airflow, efficiency, and throttle response — turning ordinary street machines into performance-oriented builds that are as fun to drive as they are reliable.
Performance Exhaust & Mid-Pipe Upgrades
Stillen Cat Back Exhaust for Infiniti Q50 delivers a great example of what Stillen is known for: a bolt-on, performance-enhancing exhaust system crafted from 304 stainless steel with mandrel-bent piping and polished dual tips that not only boost horsepower and torque but also produce a rich, authoritative sound without harsh drone.
Depending on your vehicle, Stillen exhaust systems and mid-pipe upgrades can improve exhaust flow and scavenging, enhancing throttle response and giving your engine a deeper, more aggressive exhaust tone under load — while maintaining quiet cruising when you want it.
Airflow & Intake Enhancements
Air intake upgrades are another cornerstone of the Stillen performance catalog — offering better airflow and improved throttle feel across many popular performance platforms:
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Stillen Air Intake Kits for Nissan 370Z – A high-flow Gen 3 intake designed to optimize airflow and give noticeable performance gains.
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Stillen Generation 3 Ultra Long Tube Cold Dual Air Intake Ki – A top-rated intake for Nissan 350Z owners seeking smoother airflow and extra horsepower.
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Stillen Kia Stinger GT AWD Air Intake – Helps Kia Stinger GT engines breathe more efficiently and perform with enhanced responsiveness.
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Stillen Hi-Flow Air Intake for Infiniti Q50 – A performance intake that boosts airflow on turbo-charged V6 platforms.
These intake components use smooth-bore tubing and optimal filter placement to reduce airflow resistance, resulting in sharper throttle response and increased power potential when paired with tuning or other bolt-on upgrades.
Power & Driveability Upgrades
For drivers looking to unlock even more from their engine without complex modifications, Stillen’s inline power modules offer a simple, bolt-in solution:
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Stillen TruControl Inline Power Module for 2022-2024 Honda Civic Si – Boosts pressure and torque gains with plug-and-play ease.
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Stillen TruControl Inline Power Module for Hyundai Elantra – Another inline module option designed to enhance performance through improved boost control.
These power modules tune critical engine parameters via the factory wiring harness, providing noticeable gains in power and responsiveness without the need for ECU reflashes.
Additional Performance & Handling Parts
Stillen’s lineup isn’t limited to exhaust and intake systems — they also provide upgrades that contribute to better handling and drivetrain efficiency, such as:
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Stillen Adjustable Rear Sway Bar Kit – Improves chassis stability and reduces body roll for sharper handling.
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Stillen Underdrive Pulley for Nissan 370Z – Lightweight, precision-machined underdrive pulley that reduces parasitic loss and improves throttle response.
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2017-2021 Infiniti Q60 - STILLEN Front Splitter & Winglets – Aerodynamic styling parts that enhance front-end presence and can complement aero performance builds.
These parts help drivers refine their cars beyond straight-line performance, improving cornering dynamics, weight distribution, and chassis behavior.
Why Stillen Is a Trusted Choice
Stillen was founded in 1986 and became known for its motorsports-inspired parts, particularly for Nissan and Infiniti platforms, before expanding to support a broad range of vehicles. Their products are designed and tested for durability, performance, and everyday usability, often backed by limited lifetime warranties on many components — giving builders confidence they’re investing in quality hardware.
Whether you’re looking to enhance exhaust sound and flow, improve intake efficiency, or refine handling and response, Stillen offers a catalog of performance parts that fit smoothly into your build philosophy.
Explore Stillen Performance Upgrades
Ready to elevate your vehicle’s performance with proven Stillen parts?