Well, the Flowmaster Hemi HD I put on my truck is still to loud and resonates pretty bad from 1700-1900 rpm's. The resonated tips I installed helped a tad but not enough for me to keep the muffler. I'm going to try an 05 SRT-10 tailpipe, it comes with a full factory resonator. Here's a pic, I'm getting just the tailpipes, not the muffler (this is a pic of an SRT-10 system, not the actual one I'm getting). If this doesn't do it, the muffler is coming off.
Jim

 

ohok thats probably a good idea if the price is right

 

It was $20 plus shipping.
Jim