A buddy of mine suggested I straight pipe the Crown Vic instead of wasting money on better mufflers and high-flow cats and such. After a little research, I read a few things saying that straight pipes can actually cause you to loose power because it releases all of the back-pressure. Is there any actual truth to the power loss? And I know, the Crown Vic is no rocket ship, but that’s exactly why I can’t afford to lose any power over how little it already has...

End game here is that I want a nice rumble from the exhaust when I’m on throttle, but not anything that’s gonna wake the kiddos when I start up the car to head into the office in the morning. I found one video on YouTube that I liked the sound of and the guy described it as a straight pipe with no mufflers and all four catalytic converts “plugged”. Any idea what that means? Are they just old cats that are all gunked up? Or is this some sort of slang that I missed out on?

Link to aforementioned YouTube video: https://www.youtube.com/watch?v=kyk6LrPZBkA&t=11s