all i can say is wow ,i installed mympacesetter lts ,true duals,xpipe into 2 dynomax straight through muffs ,straight out the back.sounds and feels like a big block now .at idle you cant even hear it run but take off and wow phenomenal sound roars.cruising down road cant hear it ,no resonation what so ever .i highly reccommend this setup .2.5 all tthe way .i used too have like a powerband with other setup.1 into 2 .now its across the board.the muffs are straight throughs though very deep sound ,not the parts america dynos theyre chambered s style .any ? feel free too ask i wish i could video tape and put it on here one of the best sounds.idk how too unless my son could do it for me lol ,but not kidding.