Audi S4 Parts

Shop APR performance packages featuring matched hardware and software engineered to deliver reliable power, drivability, and value.

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.

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.

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.

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.

Show of your APR Pride!

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.