[sygfrid]

Before you add dampeners which also adds weight onto the panels, perhaps you can address some of the exhaust drone by dampening the exhaust pipe first. Treat it like any other wind musical instrument. If you put dampener/insulation on the exhaust pipes (mid & catback), the insulation material can absorb some of the pipe's vibrational frequencies & muffle the sound. When we wrapped DEI Form-A-Shield onto the mid pipe of the `19 TRD SE exhaust, the mid & high notes got muffled making the sound more on the bass side.

For the road noise, having underbody covers like Verus rear diffuser, Transmission Tunnel Cover, Differential/Suspension Cover, & the JDM Underbody Aero Covers help too as they reduce the drag that also creates such noise. You're also getting the benefits of increased downforce.

If, after doing the aforementioned, still doesn't give you the lower noise level that's suitable for you, then you can start adding dampeners to the body.

Originally Posted by Rya6822

Hey! I really love having my back seats down but the exhaust drone and road noise is just too much. I didn’t realize the back seats played a large role in dampening the sound. I’m looking into putting some dynamat in my trunk to remove some of the noise (Not a majority cuz I like my loud car) but where would you guys recommend I cover mainly? Around the spare? On the lid? Wheel wells?