If you want to lower the sound pressure level (SPL) of your new CrateMufflers?, or any muffler, you can install a resonator. The resonator is designed to attenuate overall sound. This is perfect for customers looking to reducing the sound level 2-3?B(A). This straight-through design will not degrade the performance of your vehicle.
CrateMuffler? Resonator – 2.25″ Center Inlet/ 2.25″ Center Outlet 3.5″ Round x 10″ Long Body 14″ Overall Length. Universal Part. Reversible Design.