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with valves open - I'm curious if you (Dinan) can share how much exhaust flow (in terms of percentage - guesstimate please) is bypassing the muffler
Love what you've done here seems like stock at times passing through the muffler and almost straight-piped muffler bypass at full song
Thanks - beautiful work / granted really just for sound - but that sound may just may be worth it to many
ps- our first modded bmw was back in 1987 when we had a dinan chip soldered into the ecu of our 1985 528e - we met Steve at the shop :-)
ps - yes i think we gained 3hp - bahaha - but it was all we had :-) and were thankful for Dinan
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