Quick question and let me start by saying that I know I could make many changes and get better performance and I might do that down the road but for now, money is tight so trying to make do with what I have. Anyway, bought my 07 Ultra in Oct. it has a new SE110, now has about 4000 miles on it, dealer rebuilt trans and new clutch, Woods 777 cam and when I took it to have it tuned, it has a TTS tuner, they dealer told me that the y pipe is killing performance along with the rush slash cuts because the baffles needed replace. Well, they had a good looking pair of rinehart 3.5's that they had just taken off and I got those, great pipe and better sound. Anyway, i am going to do the fullsac true dual conversion, I like how duels sound and yes, I know 2 into 1 is better for low end torque and performance but I am not looking to race. Anyway, will the 3.5 rineharts be okay or will I need to put on 4 or 4.5 muffler to get a better sound and performance? Just looking for some insight, I asked about fullsac a month or so ago.

 

The 3 1/2's will sound great with that setup. I am not a true dual fan because of the performance but they do sound good.