BMW E39 M5 | Dyno Day

Here is some music for your ears. My 2002 E39 M5 on the dyno. Supersprint headers, catless x-pipe, resonated midsection and custom muffler delete. Tune was done by 22RPD in Renton, Washington. The car made 389/363 whp/tq at 165,000 miles.

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