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APR MS100128 Ultracharger for Audi B8 S4

Achtuning Price: $1,599.99
Item Number: MS100128
Manufacturer: APR
Manufacturer Part No: MS100128
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The APR Ultracharger System dramatically increases horsepower and torque, and maximizes the power potential of the 3.0 TFSI. It removes a massive pre-supercharger restriction, allowing uninterrupted airflow into the supercharger bringing power to 478 HP and 426 TQ on 91 octane fuel and up to an astonishing 542 HP and 472 TQ on 104 Octane fuel. Stunning carbon fiber and smooth cast-aluminum adorn the system, creating a clean and simple install that looks just as powerful it is. Finally, APR’s innovative Ultracharger ECU Upgrade delivers a smooth and exciting driving experience, and it is included as a free upgrade to all who own an APR Stage II ECU Upgrade.

The factory throttle body is a massive power-robbing restriction. Its cross-sectional area is ~25% smaller than the supercharger’s inlet, causing airflow to plummet at high supercharger speeds. It’s responsible for losses as high as 33 HP!

The APR Ultracharger Throttle Body is huge. Its cross-sectional area is ~28% larger than stock, and an additional 5% larger than the supercharger’s inlet. It completely eliminates the throttle body as a point of restriction and allows for maximum airflow into the supercharger.

APR’s incredible Ultracharger ECU Upgrade is why it all just works. It delivers an outstanding driving experience, packed with a smooth daily driving, thrilling wide open throttle acceleration, and unmatched performance. It’s APR's most advanced 3.0 TFSI software to-date, and it’s included as a free upgrade to all who own an APR Stage II ECU Upgrade.

APR Ultracharger System Fitment:
The APR Ultracharger Kit is designed to fit the following vehicles.

  • 2010 Audi S4
  • 2011 Audi S4
  • 2012 Audi S4
  • 2013 Audi S4
  • 2014 Audi S4
  • 2015 Audi S4
  • 2016 Audi S4
  • 2017 Audi S4

APR Ultracharger Manufacturing:
The APR Ultracharger is made from carbon fiber and smooth cast-aluminum. Gaskets, bolts, clamps, couplers, and wiring and hose extensions are included as is a set of NGK BKR9EIX spark plugs.

APR Ultracharger Kit Install:
Installation of the APR Ultracharger typically takes about 3 hours.

APR 3.0T Ultracharger System Warranty:
APR parts are warranted to be free from defects in the materials and workmanship prior to installation. This warranty does not cover labor, misuse, faulty installation, failure of related parts or parts purchased other than from APR, LLC. This warranty extends to the original purchaser for as long as they own the vehicle and the hardware.

Required for installation:

  • APR’s Stage I ECU Upgrade
  • APR’s Supercharger Drive Pulley Upgrade
  • APR’s Supercharger Crank Pulley Upgrade
  • APR’s Stage II ECU Upgrade
  • APR CPS or AWE Tuning ColdFront supercharger cooling upgrade
Recommended for optimal performance:
  • NGK BKR9EIX plugs gapped @ .024” +/- .002” torqued to 30Nm *included with Ultracharger
  • A high flow intake system. For the best results, APR recommends removing the intake snow screen
  • High flow catalytic converters

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