I have an 08 CVPI and a 1996 Lincoln Town Car and I've always wondered why is my Crown Vic PI so much louder than my town car. They both have dual exhaust and now I see why. I might do this to my Town Car. The year difference might have something to do with it idk.
Hey thanks for the comment! Yeah that definitely could be why your two cars sound different. The cop car had a bigger intake too but you’ll probably notice a big difference taking your air silencer off.