Thread: How to make a Defender Quieter

Two of them had already fallen out!
I put new M4 nutserts in their place and tightened up the remaining one.
Rear view mirror back in place!
Just need to wait for it to get really windy and go for a drive.

A week long trip up to the Vic high country has given the thinsulate a good test out.
Generally it has worked exactly as expected - lots of high frequency noise has been removed and I can also no longer hear the induction roar from the snorkel.
Some of the lower frequency wind noise remains and has obviously now become a bit more noticeable.
I need to get some more pool noodle foam to fill in some left over gaps in the top of the front roof bar which will help remove this.
I also think the hollow header rail at the top of the windscreen is worth stuffing with thinsulate because this is a bit of an echo chamber and radiates a fair bit of wind noise. I've also got some left over heavy vinyl layer, so once the thinsulate is stuffed in the rail, I'll also put vinyl patches over the holes which will further reduce the noise radiated out from here.

This thread is excellent.

One of the main gripes with my car is how loud it is at 100k. Would be super great if I could get the sound levels down at highway speeds. Might have to work through this. Thanks for putting it together.