My friend who's a mechanic can hear an exhaust leak where hes guessing is by my y-pipe based on sound im a new car guy so to be honest didnt really notice anything until he said something. He said its like 100% very minor but im young and just started full time so 400$ to fix the leak is not much but still hurts a bit. Im worried mostly about my MPG as gas in canada right now is ridiculous not so much about preformance because i plan on getting a custom exhaust. I want to know if its okay to wait till i get a custom exhaust or if i should get the leak fixed pronto. Is it olay to leave it is this a horrible idea to leave it? My delema is were not 100% sure if its an exhaust leak i just bought the car quite literally yesterday. And had it saftied by the dealership. Exhaust leak is part of the safety so it shouldve been fixed if it is an exhaust leak and is under the 36day or whatever it is warranty, the dealership is an hour away from me and is a pain in the butt to go to. They are lenient and probably would just send the money or something if I could prove its an exhaust leak. Im just sort of in the middle shoukd I go to the dealership to check if it truly is an exhaust leak and have them fix it, bite the bullet on the hour long drive. Or go to an exhaust place and have them look at it and if they confirm its a leak call the dealership and get them to pay for it. Any insight would be helpful thank you in advance!