After a short break in period for our newly installed Eisenmann Race downpipe-back exhaust system, IND’s own F10 M5 project car made its way to AMS Performance for some dyno testing. We were blessed with nearly identical weather conditions on both days, with temperatures falling within 5 degrees of one another, which helped us obtain consistent results. Our testing showed a consistent 7-10hp gain from switching to the Eisenmann exhaust system, and the dyno graph below represents a “middle of the road” set of runs, displaying a mid range stock run coupled with a mid range Eisenmann test run.
The original exhaust system from BMW is an excellent match for the boost level and performance of the F10 M5 as it comes from the factory. Once boost pressure and horsepower are increased the original exhaust system will begin to restrict exhaust flow, and performance exhaust systems like the Eisenmann will truly begin to shine, allowing modified cars to reach a higher power potential.
