fastd,
Are you planning to still have the full under car exhaust setup?
For my ERA FIA (still under construction), I am planning to go with the under car exhaust as well, but with a setup that will exit just ahead of the rear tire.
What I am after is something a bit quieter than the FIA race exhaust, but with a bit more volume than the full under car exhaust system
I am very interested to see what diameter pipes and muffler you wind up using and how you like it. Let us know what you come up with. Thanks!
- Tim