2018-Present Audi S5

The Audi S5 is such a masterpiece. For all of our 2-door coupe lovers this car really hit the spot. Even though the team at Audi did an amazing job with this car, don't settle for stock! APR has you covered with a full support of engine hardware, brakes, wheels and accessories! Modifying your car is all about expressing yourself through the platform you're excited about. For us, it's through power and performance! Check out all of the software and tuning support we have for your S5.

APR Performance Packages

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Software & Tuning

APR’s software and tuning solutions deliver refined performance engineering—precision ECU and TCU calibrations, along with inline modules, that elevate power, transmission response and driving dynamics while maintaining the integrity of your European vehicle’s factory systems.
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Engine

APR’s Engine Hardware delivers true performance engineering—meticulously crafted intake systems, turbocharger upgrades and support components built to integrate with calibration upgrades and boost your vehicle’s breathing, response and power delivery on VW, Audi, Porsche and other European platforms.
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Suspension and Mounts

APR’s Suspension & Mounts collection embodies European performance engineering — purpose-built coil-overs and hardware that refine ride height, minimise deflection and enhance chassis balance. Designed for precise integration, sharper control and enduring quality on VW, Audi and Porsche platforms.
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Wheel and Accessories

APR wheels merge motorsport engineering with streetcraft — flow-formed and forged alloy constructions deliver reduced unsprung weight, optimized strength and OEM-plus fitment for Volkswagen Group performance vehicles.
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Cosmetics and Gear

Show of your APR Pride!
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Exhaust Systems

APR exhaust systems deliver pure European performance engineering—crafted from premium T304 stainless steel, mandrel-bent tubing and straight-through mufflers to refine note, improve flow and enhance both driver engagement and aesthetic presence on VW, Audi and Porsche vehicles.
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APR ECU Upgrade

Delivers up to 411 HP with 551 FT-LBS (APR Plus)
Delivers up to 411-491 HP with 551-629 FT-LBS depending on octane (APR Stage 1)
Delivers up to 529-620 HP with 554-622 FT-LBS depending on octane (APR Stage 3)
Max gains of +103 AWHP and +190 AWFT-LBS (APR Plus)
Max gains of +103-171 AWHP and +190-249 AWFT-LBS depending on octane
Supports 91 AKI, 93 AKI, 100 AKI, 104 AKI, and E60-E85 fuel grades (APR Stage 1 & 3)
Max gains of +172-171 AWHP and +255-263 AWFT-LBS depending on octane (APR Stage 3)
Optional factory term limit matching limited powertrain warranty with APR Plus
Standing RPM soft limiter increased

View APR ECU Upgrade - 3.0T EA839 V6 (B9) (S4/S5/SQ5)

APR Catback Exhaust System

Complete catalyst-back system including downpipes, extending from the factory catalyst back.
Performance gains of 10 HP and 12 FT-LBS of torque delivered to all four wheels.
Premium T304 stainless steel construction with TIG welding for strength and durability.
Optimized flow through dual 2.5” downpipes, 2.75” midpipes, and a 3.5” midpipe.
Mandrel-bent brushed piping paired with electropolished cast splitters for a refined finish.
Precision brackets and slip clamps ensure accurate alignment and hassle-free installation.
Includes an upgraded tunnel brace to accommodate the larger piping.
Integrated Helmholtz resonator minimizes drone and enhances sound quality.
Valve-controlled rear mufflers dynamically adjust sound based on driving style.
Removable quad 3.5” motorsport-style polished tips with APR logo; optional styles available.
Smooth transitions and straight-through components maximize performance by reducing restrictions.
Strikes the perfect balance of power, sound, style, and quality for enthusiasts.
Fully emissions compliant for worry-free operation.

View APR Catback Exhaust System - S4 / S5 (B9)

Who we are - We’re a global automotive engineering firm nestled in Opelika, Alabama. Our 80,000ft² state-of-the-art facility is home to some of the best engineers in the industry, who have mastered hundreds of engine management systems. We have multiple engine and chassis dynos, and the resources necessary to create our ECU Upgrades in-house, from the ground up! We're not a new company either. We've been around since the 90's and we have a strong financial backing to ensure we'll be here to support you for decades to come!

What we do - We optimize everything to make your engine more powerful. We adjust air-fuel ratios, advance ignition, increase boost pressure, alter cam positions and lift profiles, and more, all depending on the type of engine and management system, of course! We don’t take shortcuts, and we don’t take risks. We do it the right way.

How we differ - With our proprietary calibration and direct ram access data logging tools and operating system code changes, we’re able to make some of the strongest and fastest ECU upgrades, without needing costly end user adjustments. We work with the ECUs intelligent modeling and closed-loop systems, and beta test in multiple environments to create upgrades that work no matter where you drive!