I love my Specialty Spares. They have a slightly throatier sound than others I've heard. They are not too loud (unless you remove the baffles which makes them LOUD) and sound great with my 904. Popping, as stated, is not a factor of the pipes but jet and carb adjustment. I also think the SS look better than the stock, TOR, or Bubs.

Bob 2005 America, 904cc - sold. 2014 Trophy SE.