APR Ultracharger Throttle Body Upgrade TFSI

The APR Ultracharger Throttle Body Upgrade is a performance throttle body system for supercharged 3.0 TFSI engines. It is built to remove the restriction ahead of the supercharger so the engine can draw in more air. The factory throttle body has a smaller cross-sectional area than the supercharger inlet, and APR says this can cost up to 33 HP at high supercharger speeds. The Ultracharger throttle body is about 28% larger in cross-sectional area than stock. APR says it is also about 5% larger than the supercharger inlet, so the throttle body is no longer a restriction point.

Key Features:

• Larger throttle body upgrade, about 28% bigger in cross-sectional area than stock, for maximum airflow into the supercharger
• Cast aluminum inlet adapter
• Carbon fiber inlet tube
• New wiring harness, gaskets and installation hardware
• New NGK spark plugs
• Includes APR's Ultracharger ECU upgrade, which APR offers as a free upgrade to owners of an APR Stage II ECU Upgrade
• Plug-and-play design that works with APR software
• Carbon fiber and cast aluminum construction for a clean look

Performance and Setup Notes: When paired with APR's Supercharger Drive and Crank Pulley upgrades, APR says the system can support up to 542 HP. The system works with APR's Ultracharger software, so check software compatibility before purchase. It needs other supporting hardware to work properly. This includes the supercharger drive pulley and crank pulley, an upgraded exhaust, the supercharger coolant performance system, and NGK BKR9EIX spark plugs gapped to .024 in. +/- .002 in. and torqued to 30 Nm. Intake air temperature must stay below 75°C. The factory intake snow screen should be removed and the intake upgraded. Transmission software is required to reach the higher RPM limits.

The Ultracharger throttle body upgrade helps owners of 3.0 TFSI engines get more horsepower and torque while keeping smooth everyday driveability.