Just installed a set of these on the S and S power tune header. So far I am impressed. Has a good some what deep sound. They are pretty loud too- which is what I wanted. I can feel a noticeable improvement in throttle response in the low end.
I had Vance and Hines Hi-Output 4.5 slip ons. Bought the bike used and these were already on it. I like the way they looked but I just couldn't accept the sound. I thought the bike didn't even sound like a Harley with them on( they may have had the quiet baffles in them- I don't know). They were also robbing power as others have mentioned before.
Anyway.... if anyone is considering these- I would recommend them. Chrome finish looks really good too.

 

I am looking to replace my stock slipons with the same RC Components slipons. What baffle? Also, what bars do you have?

 

2.50 baffle.
The bars are LA Choppers 10" Twin Peaks.

 

I just put on the same ones. I noticed a slight drop in milage and an occasional popping on deceleration. Have you experienced similar issues?

 

Hmm. I ordered my RC's but there was no option on baffle size. Do they come with the 2.5s?