This is a 1991 E31 850i with just under 150k Kilometers on it. 6MT and LSD as god intended.
The engine has to come out because of a leaky rear main seal, and we are planning to build a custom catback/valved equal length stainless steel exhaust for it and possibly doing some headwork for additional flow and power.
So I decided to dyno it to get a baseline!
Related threads I previously posted:
Post purchase:
https://g80.bimmerpost.com/forums/sh….php?t=2203013
Replacing the rusty mufflers:
