The 2015 Audi S3 is already a fantastic performance vehicle straight from the factory, offering a great balance of power and agility. However, for enthusiasts looking to take their S3 to the next level, a range of modifications can unlock its true potential. This guide focuses on practical and impactful upgrades for your 2015 Audi S3, enhancing both performance and driving experience without breaking the bank.
Stage 1 Tune: Unleashing Hidden Power
The single most transformative modification you can make to your 2015 Audi S3 is a stage 1 ECU tune. This software upgrade remaps your engine’s computer, optimizing parameters like boost pressure, fuel delivery, and timing. The result is a significant increase in horsepower and torque, dramatically improving acceleration and overall responsiveness. Expect a noticeable difference in daily driving and spirited runs.
While stage 2 tunes exist, they often require more extensive modifications like downpipes, which can introduce complexity and potential issues, including trouble with emissions compliance. For most drivers, a stage 1 tune offers the best balance of performance gain and ease of installation, truly waking up the car’s engine capabilities.
Regarding transmission tuning (TCU tune) for the DSG gearbox, it’s advisable to experience the car with just the stage 1 engine tune first. The S3’s DSG transmission is already well-regarded, often considered superior even to tuned versions of earlier models. The transmission control unit also adapts to your driving style over time, optimizing shift points. Assess the stock transmission performance after a stage 1 tune before considering further transmission modifications.
Suspension Upgrade: MSS Spring Kit for Enhanced Dynamics
To complement the increased power from a tune, upgrading the suspension is highly recommended. The MSS Spring Kit is an excellent choice for the 2015 Audi S3. These springs are height adjustable, allowing you to fine-tune your car’s stance and handling.
A key benefit of the MSS springs, especially for cars equipped with Audi’s adaptive suspension (Magnetic Ride), is the improved differentiation between suspension modes. “Dynamic” mode becomes noticeably stiffer, providing enhanced control during aggressive driving, while “Comfort” mode becomes even more compliant, improving ride quality for daily commutes. Whether you choose the Track or Street configurations, MSS springs will revolutionize your S3’s handling and ride characteristics.
Exhaust Modifications: Resonator Delete for a Refined Growl
When it comes to the exhaust system on the 2015 Audi S3, less is often more. A full exhaust system replacement is generally not recommended. The 2.0T engine isn’t known for its exceptional exhaust note, and full systems often provide minimal horsepower gains on a car with bolt-on modifications. Furthermore, they can be a significant expense for little tangible benefit.
Instead of a full exhaust, consider a resonator delete. This simple and cost-effective modification removes the resonator from the factory exhaust system, resulting in a slightly deeper and more aggressive exhaust note without being overly loud or intrusive. It adds a touch of auditory excitement without the drawbacks of a full system, and can typically be installed easily in under an hour with basic tools.
Intake Enhancements: Optimize the Stock Airbox
Similar to the exhaust, chasing horsepower gains with aftermarket air intakes on the 2015 Audi S3 is often not the most efficient approach. Full intake systems can be expensive and dyno tests often show minimal, if any, real-world performance improvements.
A smarter and more budget-friendly approach is to optimize the stock airbox. This can be achieved with a few key modifications: installing a euro airbox block off plate, upgrading to a high-quality panel filter, and removing the snow guard. These modifications improve airflow to the engine while retaining the factory airbox, offering nearly the same performance benefits as a full intake system at a fraction of the cost. Removing the snow guard, especially in milder climates, further enhances airflow without any negative consequences.
Handling Improvement: Rear Sway Bar and End Links for Cornering Prowess
To further sharpen the handling of your 2015 Audi S3, upgrading the rear sway bar and end links is an effective modification. A stiffer rear sway bar reduces body roll during cornering, resulting in a flatter and more balanced feel, ultimately increasing grip and confidence in turns.
For end links, consider options from Moog or 034 Motorsports, specifically models with bushings rather than heim joints. Bushing-based end links are more durable for street use and less prone to wear and noise compared to heim joint alternatives. 034 Motorsports end links are generally recommended for their quality and performance. It’s advisable to avoid cheaper alternatives that may reuse OEM brackets or lack greaseable ports, potentially leading to noise and premature wear.
Conclusion: Balanced and Effective Mods for Your 2015 Audi S3
Modifying your 2015 Audi S3 can significantly enhance its performance and driving enjoyment. By focusing on key areas like ECU tuning, suspension, and strategic intake and exhaust tweaks, you can achieve a well-rounded and substantially improved vehicle. Starting with a stage 1 tune provides the most impactful initial upgrade, setting the stage for further refinements in handling and responsiveness. These modifications offer a smart and effective path to maximizing your 2015 Audi S3’s potential on the road.
