I installed the catted rv6 downpipe and invidia q300. I also got the car tuned by Steve over at eztunes. It took a while for the tuning process, mostly because I had to stop halfway through and figure out how to get it to pass inspection (I live in NY). After adjusting the defoueler and flashing the ECU to stock, I finally got it to pass. Now I'm running the tune from Steve and I'm not sure if this is normal noise for the downpipe to make or if I have an exhaust leak?