This is an evolution of the blocking baffle, adding two more connection positions so you can mix the sound to your preference. We used our new RF to test the 'Mixing Baffle' for the SuperStreet Twin Tip mufflers. Allows the owner to mix the ratio of bass to treble and effectively tune the mix to what they want to hear. Deepest install is least bass and most exotic treble, and pulling it back to outer connection positions progressively adds back the bass notes and lowers the upper frequencies. Note the single tip SuperStreet has the tip kicked upwards such that mixing baffle sometimes usually won't insert to deepest position on that muffler, this item was designed in the Twin Tip (SSTT), but can often still be used on single tip with 2 connection points to try.