Just got mine.
Its going on the bike right now.
My number crunching tells me it should be good for 1-1.5 BHP.
It still has a muffler. So it cant be that loud.
To get 2-3 BHP knock out that muffler.
Cut it where the bulb starts and replace bulb with a tapered cone. aka Megaphone exhaust.
Now that would be loud and fast.
Im still conditioning the guy who stay on our street.
First the stock ex.
Then the performance ex.
Then on glorious Sunday morning at 6am the Megaphone ex.
The best part. The cops dont bother troubling Bullet owners for loud exhausts.
Our bikes come from the factory with only one cat con. Your bikes have two. So you guys probably see more gains.