[pkny]

Got mine and installed the red one couple days ago. The installation was very straight forward. It took me 10 min.

The red tube has a very noticeable different than the stock tube. I can hear it as low as 2k rpm. It has a bit more roar than the stock at the low rpm. In the 4 to 5.5k rpm, the red sounds as loud as the stock at above 6k rpm. In 6 to 7k, the red is very loud, and it’s a bit too loud for my taste. I’ll try the green one and see if I like that better.