Borla CrateMuffler Resonator Option 3in Center/Center 3.5in Round x 10in - Null Sound Center/Center Engine Components>Mass Air Flow Sensors With seven layers of progressively

With seven layers of progressively finer mesh cotton gauze/synthetic media between 100-percent polyurethane top and base

each system is handmade in the USA by master craftspeople and features premium T-304 austenitic stainless steel construction

Add optional resonator 60707 for additional sound control

2017-2018 BMW 330i xDrive Base 4 Door Wagon AWD

you know that simply getting you low is not enough for us

Borla CrateMuffler Resonator Option 3in Center/Center 3.5in Round x 10in - Null Sound Center/Center Engine Components>Mass Air Flow Sensors With seven layers of progressivelyPerfect for applications with limited space. If you want to lower the sound pressure level (SPL) of your CrateMuffler(r)s, you can install this resonator. This compact bottle bullet style resonator can also be used as a universal resonator in any system of this diameter. The Resonator is designed to attenuate overall sound. This is perfect for customers looking to reduce the sound level 2 3 dB(A). This straight through design will not degrade the