I have a 2005 Tundra Limited 4X4 with 350,000 km on it. Up until today I had a fully stock exhaust setup. I am on a relatively small budget and got a Magaflow 5x8 Oval 12268 Muffler for free from a buddy. I welded it on and did a dump right after the muffler. I get a pretty bad drone around 2000rpm. What are some solutions to fixing this, I am willing to sacrifice some of the sound. Should I remove the dump and run dual exhausts pipes towards the back or I have heard of something called side branch resonators? I don't want to swap out the muffler. Any suggestions?