spyder57
Senior Member
I don't know man, I did both the butyl and foam as well on both the trunk and the rear seats and it didn't make that big of a difference. I'd say like 10-20% reduction in drone. What really saved it for me was having an exhaust shop weld a 3" vibrant ultra quiet resonator. Now drone is stock level while cruising and still sounds great when I want it to.Did you just install yours? Once broken in, it will get a little better. You’ll still have the echo/ringing sound around cruising speeds though. I recommend removing the trunk spare parts and putting on noico sound deadeners. It reduces the sound SIGNIFCANTLY. I love the exhaust even more now. Message me if you’re interested in doing that... compliments to repyT!
you want a layer like this and another layer of 150mm noico red