I am seeing what is the best option for upgrading my E550 coupe. What exhaust systems are good or should I get a custom exhaust system? What is the best tune or should I get it dyno tuned? Is it worth getting upgraded downpipes? What is the best for downpipes and what else do I need to make sure it runs correctly. The car only has 55k miles.

 

You likely know you're in the m156/157 amg forum, but what's good for m157 is often same as m278... also they have the same weaknesses

Check out this sticky for lots of info - it'll all apply to your e550

https://mbworld.org/forums/w212-amg/...2-amg-e63.html

 

Bottom end wise the M278 is ironically in a stronger position as Tasos has explained, due to the smaller bore.

 

We are offering End of Year Sale deals for performance tuning.M278 4.7L V8 Bi-Turbo - $800 including OBD2 Flasher Tuner
- 450, 500, 550 (MED17.7.1/3 ECU)

Please email or call us for specs and details as you cannot receive PMs at this time.