I did the BC airbox replacement, had to get my instructions from NewBonneville.com too. I also have the TORs. I'm happy with the increase in power, but my best dyno run was 59hp. That's with the 145 main jets, too. But whatever the number, the best thing is the powerband is nice and linear, no big dip in the middle anymore. It feels more 'alive' now in the midrange.