Change in Exhaust Note

[Quixote]

After having put over 11,000 miles on my FJC I have noticed that the engine seems to have a nice growl to it. When I first got it it was barely audible and whisper quiet.

I am pleased with the new note, but I was wondering if this was normal. Any of the rest of you noticed this?

 

[KightOwl]

I did notice that my FJ sounds a little different. How would one describe it..."Throaty"?