The crud that forms in the intake runners and valve faces can't be good for anything. If you've cleaned the crossover pipe and intake manifold, you really don't want to do it again.

We'll see if anyone's measured fuel consumption before and after. Most people disable EGR before establishing an mpg baseline.

How do you like the 'burb? We have a 97. Sounds like a MB with no muffler but cruises at 65mph under 2000 rpm. I'm waiting for Brian to come up with a kit for it

Sixto
87 300D