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Motor Mounts (Pair) - Stern Pro w resistors for B6-B7 S4, C5 A6-S6-allroad V8 and B7 RS4


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JHM first brought these to market by modifying Stern's existing B5 S4 mounts that were 12mm too tall. We also developed the first set of resistors to eliminate the stock electronics built into the factory motor mounts that were prone to failure and setting ECU codes. We took what we learned and shared it with our friends at Stern so they could finalize their kit. So here they are.

We at JHM have these exact mounts on our in house 2005 S4 and 2007 RS4 R&D car. We are currently using the street bushings in the mounts and have found that the comfort is really close to stock. For the amount of tightening up of the drivetrain the small vibrations that can be felt sometimes at idle (in your feet if you really feel for it) are worth it. Also we have noticed small vibrations when the motor is winding down from a rev or while decelerating in gear at around 2000rpm. Like any performance mod you need to make some sacrific to get performance and we feel these are worth it and very streetable. Plus for a ton less $$$ than OEM mounts that are prone to failure. If you want to ultimate in drivetrain tightness then get the race bushings in your mounts, obviously you will lose some comfort over the street bushings.

This motor mount set is part of the new stern line of performance enhancements for the Audi S4, RS4 and A6 V8. This kit is designed as an upgrade to the soft expensive factory motor mounts which come standard with these vehicles. These heavy duty motor mounts are offered in two firmness levels to suit any performance application. These mounts also include appropriate circuitry to override the electronic monitoring of the factory motor mounts. They plug into the exact plug that the OEM mounts plug into and keep you from getting any motor mount codes.

Low and medium durometer polyurethane (choose option below) is used to help keep excessive vibrations to a minimum while still providing excellent strength and damping characteristics. These mounts maintain full isolation between the engine and chassis limiting the transfer of vibrations into the cabin.


2 firmness levels available
Factory fitment
Heavy duty durable casing Fully isolated
Completely serviceable
Electronic circuitry disabled

2003-08 Audi S4 All
2006-2008 RS4 All
C5 A6-S6 V8 All

Sold as a pair.

Installed on a B6-B7 S4 with JHM headers
Click to enlarge picture

Installed on a B7 RS4
Click to enlarge picture

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This product fits the following vehicles:
Make Model Chassis Engine
Audi A6 C5 (1998-2004) 4.2l V8 40v
Audi S4 B6 (2003-2005) 4.2l V8 40v
Audi RS4 B7 (2006-2009) 4.2l V8 32v FSI
Audi S4 B7 (2005.5-2009) 4.2l V8 40v
Audi allroad C5 (2001-2005) 4.2l V8 40v
Audi S6 C5 (2002-2003) 4.2l V8 40v
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