I'm constantly wrenching on cars but the other day I installed the heartthrob muffler delete on my 14 GT, exhaust is stock other than that. Everything has been wrenched down with an air gun to ensure nothing budges loose. Fast forward to today, finally able to take my car out on a real cruise to test it out and get a real feel for it. A bit louder than I was expecting but I also noticed a slight smell come over which gave me a sweet taste in my mouth which naturally resulted in a small headache. Everything is as tight as tight can be to the point of it jerking my air gun. Any ideas ? Hoping I'm not dumping CO into cabin as I have a 30min commute each way to work and can't afford to take a day off :shrug::shrug: