When I get on the throttle, with windows rolled up..It sounds like there is an exhaust leak somewhere. It's kind of annoying.. Anyone got any ideas on what and where it could be? I have a 4" Stainless exhaust coming but was curious to see if anyone knows anything on what else to look for when I install the new exhaust.

 

Open your hood and see if the fat rubber gasket between the hood and top of firewall has fallen off. Diesel smell will pass through the gap and get sucked into your fresh air intake.