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The TGK Motorsport Driveshaft Tunnel Brace is designed to provide enhanced clearance for aftermarket exhaust systems, replacing the shallow-fitting OEM tunnel brace. This upgrade enables the installation of larger diameter exhausts without inducing excessive r...

If you are making real power with a C7 S6 or S7, the factory DL501 clutch pack eventually becomes one of the major limitations. The stock 4.0T clutch is stronger than the version used in many 3.0T cars, but additional torque, repeated launches, heat, mileage a...

The factory DL501 programming in the C7 S6 and S7 is not terrible, but it was written around stock torque, smooth dealership test drives and keeping the average owner from complaining. Once you tune the engine, the factory torque limits, clutch pressure and sh...

One of the easiest and most underrated mods for tightening up the handling on the C7 S6 and S7 is a set of subframe inserts. The factory mounts have a bit of play that you really start to notice once you push the car through corners or launch hard. I installed...

This guide provides a detailed and organized overview of how I replaced the factory DL501 transmission with a ZF8HP in my 2013 or newer Audi C7 S6/S7. As of today, the car runs and drives great. The overall experience is much better, and this is now what I con...