Here you go. https://www.rbracing-rsr.com/lsr21.htm

 

It's all about the right combination of flow and back pressure along with a good map. The folks at Fuel Moto got it down to a science!

 

+1 on the Dragos

 

RB Racing Pro Stock. Your neighbors will hate you. Your neighbors neighbors will hate you. Car alarms worst nightmare. Love it. Lets my 124 gallop. Order it now and have it by spring!

 

and FWIW.. I like the look, quality, and sound of the Freedom Performance 2:1. Installed that setup for a guy here locally.. Don't know anything about it's performance though. Don't see to my dyno charts with that particular 2:1 floating around.

 

Ive got a Vance and Hines Pro Pipe with a Fuel Moto map... I'll never go back to duals

 

Way back in '91 I had a evo fatboy with cam, pipes, carb, etc. I did like the way it ran, but I wanted more. So I went a bit more radical with heads, bigger cam, 10-1, and a 2-1. I didn't like the way the 2-1 sounded so I put the duals that I had on it before, HUGE mistake , it was like I took 1 plug wire off. I put that 2-1 back on and I have never considered another style of exhaust since.

 

I think freedom pipe sucks! Have a knock in pipes between 2 n 3 gs after that its fine but it sucks.

 

I did two different dual set-ups before making the switch.. It was like a different bike when I put the 2-1 on!!

 

Drago's all the way! No torque dip, incredible low meaty rumble, and an excellent performer.