Borla CrateMuffler Resonator Option 2.25in Center/Center 3.5in Round x 10in - 400937

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.