@BillJ Heh, did you get your car on a dyno? Looking for a few extra ponies?
You’ve been following my saga, the quick change out of my muffler gave me something from a butt dyno standpoint, and that wasn’t even properly tuned…. I’m guessing I got an additional 20 hp just from uncorking mine and upping main jets to address the lean spikes.
It gets LOUD though, the flat 6 is not a quiet motor