dracul
Turbocharged
If you ever have the oportunity to look down into the internals of a Rocket, you will understand the clunk....it looks more like the inside of a Peterbuilt.
Maybe coincidental but my "whining" went away after installing the K&N's
I have the K&Ns, TORs, GI pro with ATRE, pc3, cat eliminator bypass header but have not noticed much difference in sound quality (a bit deeper toned and more "raw" from the TORs perhaps)...of course...I'm half deaf