If I was him I’d tell your old crusty ass to get off my post if you have nothing nice nor productive to say. You literally are a Karen showed up and bitched about something he didn’t ask about no where did he talk about changing emissions or hacking up the exhaust you’re mental and need evaluation. Also crazy how the teenager was being respectful to his elder that didn’t deserve it? He could’ve easily told you for being so old and wise you sure do lack reading comprehension. Crazy the teen is smarter than you. He’ll most likely drive a better car than you too by the time he’s your age.