Audi A4 B9 (17+)

PRODUCR DESCRIPTION APR Ignition Coils are designed to be a direct plug-and-play upgrade to factory coils, and provide greater energy output, ensu...

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...

LEADING FEATURES Over 30 horsepower gains - with matching Stage 2 Tune 3" minimum size for maximum flow and performance potential Aggres...

KEEP YOUR INTAKE AIR COOL The IE FDS front-mount intercooler kit increases horsepower and eliminates heat soak. Get the most out of your tuned or ...

LEADING INTAKE FEATURES Increased airflow - Get the most out of your upgrades High-flow velocity stack - True performance design Sealed heatshie...

LEADING FEATURES Horsepower & torque gains maximized Includes Apple & Android mobile flashing app Boost control optim...

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 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  *Pre-faclift models (up to 2012) require Fit Kit - Please see Fit Kit MS100136 or ES3219342 for a complete installation* P...

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

APR’s Forged Wheels are manufactured using the latest strengthening and weight savings techniques to provide an attractive solution ready for the ...

PRODUCT DESCRIPTION  The APR Ultracharger System dramatically increases horsepower and torque, and maximizes the power potential of the 3.0 TFSI....

PRODUCT DESCRIPTION  The APR Boost Hose System is a comprehensive, direct replacement upgrade, to the factory rubber hoses found in the charge pi...

The APR Boost Tap for the 1.8T and 2.0T EA888 Gen 3 engines is a simple, yet elegant solution for referencing boost pressure and vacuum as is comm...

The APR Carbon Fiber Intake System is an attractive high-performance upgrade designed to increase performance by letting the engine breathe more f...