Garage Auto Sports

GAS 84mm Throttle Body Upgrade, Audi 3.0T EA837

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Select your application: MercRacing MRA1900

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Upgraded 84mm stock location throttle body for your supercharged EA837 3.0T 


Our throttle body upgrade mounts in the factory location, removing any need to purchase a proprietary intake. Any 3.5" intake you already have on your car will be a direct fit for this throttle body upgrade, or you can choose to upgrade to our Omega 4" intake kit for maximum flow! This kit replaces our previous 80mm offering.

Our billet throttle body adapters feature a smooth taper and are milled to perfectly match the OEM 70mm supercharger inlet. We have engineered these plates to be able to be easily ported up to 80mm to match even the most aggressively ported superchargers, something you simply can't do with other upgraded TB kits due to their snout-style design. The lack of a snout on a ported charger also means much less restriction at high RPMs.

Our adapter plates have a meth bung machined into the top face for easy WMI installation just after the throttle body, eliminating the need to drill your intake or supercharger inlet. WMI bungs will come pre-plugged with a stainless 1/8" NPT plug.

Every kit will include a harness for plug-and-play operation, but a wiring Diagram can be found here in case you don't have a wiring harness.


  • 84mm throttle body provides huge flow, especially when matched to the largest 80mm ported supercharger inlets
  • Pre-tapped for WMI, just add meth!
  • Billet reducer is easily port-matched to any supercharger inlet size
  • Compatible with any upgraded TB ECU software you may have such as Jackal, APR, 034 or IE (re-pinning may be required for 034 software)
  • Stock-location mounting means compatibility with your existing intake, no intake purchase is necessary to run our kit
  • 31% increase in cross-sectional area compared to the stock throttle body
  • 100% compatible with the MercRacing MRA1900 supercharger upgrade!


  • 84mm throttle body
  • Billet adapter plate with WMI port
  • Gaskets x2
  • Hardware for throttle body and supercharger
  • 1/8" NPT stainless WMI plug

This kit will ship with a 3.5" coupler included. If you require a different coupler, please include it in the notes. If you order the throttle body with our 102mm Omega kit, a 3.5" to 4" reducer will be included.

Stock throttle body = 3.00" coupler size
GAS 84mm throttle body = 3.50" coupler size
Omega Intake Kit = 4.00" coupler size

If you have an APR Ultracharger, 034 Super Duper, or IE TB upgrade, select the "Adapter Plate & Hardware ONLY" option. You will be shipped an adapter plate, gaskets, and hardware, but no throttle body or harness. This option will allow you to relocate your throttle body to the stock location to run our Omega 4" intake or any other stock location intake of your choice.

  • 2009-2016 Audi B8/B8.5 S4 3.0T EA837
  • 2013-2016 Audi B8/B8.5 S5 3.0T EA837
  • 2009-2011 Audi C6 A6 3.0T EA837
  • 2013-2018 Audi D4 A8 3.0T EA837
  • Now fits CREC/CREH applications!