What's the increase in mojo ? That's the $64,000 dollar question is it not ?
( that's the 2 into 1 on the M8 Fatboy in Australia )
I have read on the US sites that an exhaust change alone will give you the "looks and sound" but do nothing for performance , whereas over the last 25+ years an exhaust and air filter change on a stock Harley with a "tune" could give sometimes 25+% more power and torque.
what that means is the stockers up to and including 2017 were choked/emissions control blocked until we "fixed them".
that's why I asked about the increase in mojo ?