Mine's getting pretty loud these days too. 32k miles on it, seems like the longer I have it the louder it is, not very much louder with the Rokktech sensor though. At least it doesn't sound like a gasser with a bad lifter anymore.

 

OK, first tank done withthe roktech sensor, full advance install, every thing else left the same, quzd still on 100 hp setting. Results before 12.5 mpg, results after 13.6 mpg. So I picked up a little over 1 mpg not bad, at this rate the sensor is paid for in two tanks. Guess I will leave it on. looks like if I want to break into the 15'2 I will have to add a tonue cover.