Originally Posted by rfr66

The 2011 I drove had stock exhaust. It was a leased car by an elderly gentleman offered for sale through the dealer. I went back and forth driving between the 2014 and 2011 twice to make sure about the loudness difference and the 2011 is much louder than the 2014. Another important difference is on the 2014 when I rev it in neutral the rev limiter will cut in at 4000 rpm and on the 2011 I can rev it in neutral all the way up to the red line. Whether the exhausts are the same in both years the noise levels and rev limiter settings are definitely not.

Originally Posted by jagtoes

I would suggest the difference was between standard exhaust vs. performance active exhaust systems. There would be a difference there but a 2011 standard exhaust vs a 2014 standard exhaust would be the same. Also the PAE in 2011 vs the PAE in 2014 would be the same. About the 4000 RPM cutoff that seems strange to me. I don't have that in my 2012 XKR with PAE.

Originally Posted by rfr66

I guess I'm a little confused between standard exhaust and performance active exhaust. My 2014 xkr has electronic valves in the exhaust which open and close depending on rpm but it is still pretty quiet sounding. What is the difference in the PAE and how would I know if I had it or another car had it? Is there an additional switch somewhere? The 4000 rpm cutoff would be a sign that I dont have it if yours revs all the way up.