I currently have the Screaming Beagle slip on's installed on my 107 with the stage 2 torque cam and Ventilator AC.
By changing to the Rinehart 4.5" slip ons do y'all think the performance will be better/worse/no change?
Do you think I would need a retune? (I don't but then again I'm no expert)
I don't expect any earth shattering gains but I don't really want to lose my low end torque either.
I want to switch the muffs out because the SE ones are a bit too quiet for my liking...

 

I saw an early M8 dyno on utube. He saw no horsepower gain going to screamin eagle slip-ons from stock. So going to Rineharts may or may not be louder. Mine runs best with torque cam and stock mufflers.

 

Really depends on the baffle they use as to how much back pressure they maintain. I wouldn't get your hopes up with sound and more specifically volume with the M8. Personally I do not care for the deep but no ***** volume of the large exhaust cans.

The twin same really needed a stage one to run to their potential and were quite loud with certain headers and mufflers. The M8 is not the same.

 

The 4.5" MotoPro Rineharts come with the hi-flow baffles. A little torque will be lost, but they will sound deeper/louder than the SE muffs.

 

Do you think the 4" Rineharts are a better option on a 107 with a stage 2 cam?

 

Probably so. I would bet they flow similarly to the SE mufflers. My setup is incapable of getting max benefit with the exhaust I have. I'm ok with that because I'm not chasing numbers, but my exhaust is just too free-flowing and the torque suffers a bit because of it.