Audi S4

APR is pleased to present the high flow, Turbo Muffler Delete for various 1.8T and 2.0T engines featuring an IHI turbo. All too often OEM componen...

PRODUCT DESCRIPTION  APR's Wheel Spacers physically move the wheel further away from the hub. In doing so, they give your wheels the desired off...

PRODUCT DESCRIPTION APR's Supercharger Drive Pulley Upgrade decreases the diameter of the factory pulley from ~63.25mm to 57.75mm, which in t...

The APR Turbocharger Inlet System outflows the factory components by up to 45%. This is achieved through elimination of the most critical restrict...

APR's ECU Upgrades are the best dollar-per-horsepower modification one can make to improve engine performance. The upgrades dramatically increase ...

PRODUCT DESCRIPTION The factory Gen 1 supercharger drive pulley is pressed on to the supercharger's input shaft. It's not possible to remove the fa...

PRODUCT DESCRIPTION The APR Turbocharger Inlet System outflows the factory components by up to 45%.  This is achieved through elimination of the m...

PRODUCT DESCRIPTION  The APR Race Midpipes are both 2.5” and are designed as a simple plug and play upgrade. We use T304 stainless steel piping th...

PRODUCT DESCRIPTION The APR Billet Stainless-Steel Dogbone / Subframe Mount Insert limits driveline movement, which helps to minimize wheel-hop an...

PRODUCT DESCRIPTION The APR Turbo Inlet Pipe is an easy-to-install bolt-on upgrade that eliminates a restriction before the turbocharger. Unlike ...

  The APR Pendulum mount replaces the factory mount with a new, thick, billet-aluminum and billet-stainless-steel two-piece design, featuring a PTF...

APR's ECU Upgrades are the best dollar-per-horsepower modification one can make to improve engine performance. The upgrades dramatically increase ...

APR's ECU Upgrades are the best dollar-per-horsepower modification one can make to improve engine performance. The upgrades dramatically increase ...

APR's ECU Upgrades are the best dollar-per-horsepower modification one can make to improve engine performance. The upgrades dramatically increase ...

APR's ECU Upgrades are the best dollar-per-horsepower modification one can make to improve engine performance. The upgrades dramatically increase ...

APR's ECU Upgrades are the best dollar-per-horsepower modification one can make to improve engine performance. The upgrades dramatically increase ...

PRODUCT DESCRIPTION The APR Intercooler System is a massive front mounted upgrade that dramatically reduces intake air temperature (IAT), minimizes...

PRODUCT DESCRIPTION  The APR High Pressure Fuel Pump (HPFP) dramatically increases the maximum volume of fuel the HPFP can deliver. In doing so, th...

PRODUCT DESCRIPTION  Features: Increase valve train control 71% weight reduction over OEM Golf R retainers 19% weight reduction over OEM Golf R s...

PRODUCT DESCRIPTION  The APR Valve Spring System is a high performance, lightweight upgrade designed to increase valve control and eradicate valve ...

PRODUCT DESCRIPTION  The APR High Pressure Fuel Pump (HPFP) dramatically increases the maximum volume of fuel the HPFP can deliver. In doing so,...

PRODUCT DESCRIPTION  Upgraded injectors for use with with APR B6 A4 Stage 1+ and K04 Tunes. Features: Larger than stock OEM quality Plug and pl...

PRODUCT DESCRIPTION  The APR K04 Turbocharger System is a drop in turbo upgrade that dramatically increases power. With this upgrade and accompan...

PRODUCT DESCRIPTION  The APR Intercooler System is a massive front mounted upgrade that dramatically reduces intake air temperature (IAT), minim...

PRODUCT DESCRIPTION Back in the day, an OEM S-Line rear bumper and OEM S4 rear valance were required for proper fitment of the AWE Tuning B8 A4 Qu...

PRODUCT DESCRIPTION Presenting the AWE Exhaust Suite for the B7 S4: The ultimate exhaust solution for the 4.2L Deep, sophisticated V8 tone Dyno-v...

PRODUCT DESCRIPTION Presenting the Track Edition family of AWE Tuning S4 Exhausts. For those who want it loud. Gains of 8 Crank HP and 9 Crank TQ ...

PRODUCT DESCRIPTION Perfect quality, fitment, performance, tone and options to go around. You’re looking at the new standard for Audi’s skyrocket...

PRODUCT DESCRIPTION *This injector upgrade is only compatible with matching ECU software* High horsepower configurations often require more f...

PRODUCT DESCRIPTION APR Roll-Control Lowering Springs are designed to improve handling while delivering a stylish visual upgrade to the vehicle.  ...

PRODUCT DESCRIPTION The APR High Pressure Fuel Pump (HPFP) dramatically increases the maximum volume of fuel the HPFP can deliver.  In doing so, t...

PRODUCT DESCRIPTION After years of research, testing and competitive analysis, APR is pleased to announce a technical partnership with Brembo; the...

PRODUCT DESCRIPTION APR’s Big Brake Upgrade is an ultra-durable, feature-packed solution specifically tailored to each vehicle.  The brakes provid...

PRODUCT DESCRIPTION The APR Exhaust Valve Remote lets you override the factory exhaust valve operation to fully open the exhaust valves at the pre...

PRODUCT DESCRIPTION The APR Race DP and Midpipes are the ultimate exhaust upgrade for the Auti 2.5 TFSI EVO!  This system is sold in multiple conf...

PRODUCT DESCRIPTION The APR CPS Fit Kit is required in order to install the APR CPS System on pre-facelift B8 and C7 Audi models. The Fit Kit is a...