I didn't install it myself. Ever since I moved out I just don't have the storage for tools, jacks etc. I brought it to a reputable shop, but I feel like they had to have just not sealed everything properly. I'm also getting a code for p2196 again (pending), which is frustrating. Gonna call the shop tomorrow and ask em to check it out. Thanks for all the tips and adviceI was able to find tiny leaks in my mine, stuck shop vac in the exhaust set to blow air, then sprayed soapy water all over the downpipe.