I went with the yoshi r-77 full system. Slip-ons really don't make sense at all. I lost 35 lbs. with the yoshi full system, best looking can IMO. I actually noticed the huge weight difference with the new system. Sounds good after you rip the baffle out. Not as loud as the brocks, but does sound really good. Yoshi all the way!!! The brocks is good too though.