Installed new Berk RHFC and Stillen Cat-Back Exhaust on my 2007 G35X. The drone is ridiculous with this exhaust. Anything from 1.5k to 3.5k rpm is just drone city. I have read about having J pipes installed to help.. what are my other options? Can I just replace the axle back portion? If so, who makes the quietest exhaust.

 

You can try getting a good resonator installed in the mid pipe.

 

I installed an Ark GriP exhaust on my 2015 Q50S, NO drone at all. All Stainless, Just loud enough. The Q-50 was just TOO quiet. Funny, my wife is a teacher, when they go out somewhere for a "lunch and learn', they all want to go in her car because it 'sound so cool" LOL