Sounds like a racing Evinrude. Or a riding mower with a rusted out muffler/spark arrestor. It's loud, and it is in dire need of a head pipe to extension gasket, gunshot pop with every upshift unless I really get on the throttle hard.
But the gains, oh the gains...
Sam would not clear 66mph without a massive fight when the stock muffler was in place. Went wide open on the way home last night, was pushing 90mph and climbing when I backed out of the throttle. Instant throttle response. No more stumbling, no more hesitating, no choke necessary... and it looks killer, stepped up pipe and a slash cut 3" diameter muffler, very track looking circa the late 1960s or early 1970s.
Kept me from getting run over in a parking lot today going to lunch. The woman in the S.U.V. must have heard me bark the throttle, because she stopped and was quivering...
And it used 1 quart less fuel on my commute. Just under 48mpg, it had been pulling down around 41 mpg, which is pathetic until the big windscreen, bags and my 6'2"+ self is added into the mix.
I come home after midnight. Riding behind Doug on his Vance and Hines Straight Shot equipped 1500 Drifter today, I could not hear him. Lisa can hear me heading to the house from close to a mile away... not cool. Pokey with the 29 inch extension after the muffler is fairly mellow, Sam on the other hand could give a crashing Chinook helicopter a run for its money.
Better lines, more power, better fuel economy... Or wake up the entire northeast and southeast corners of 2 counties every work night...