Exhaust

Hey guys I'm new to the forum. I have an 07 P71, I wanna do exhaust but everything is expensive. Does any body know how much longer the pipes are from the axle back on the crown vic compaired to a mustang? eBay has an axle back set up for $150 with mufflers and pipes, I'm really looking for just sound, breathing a little better would be nice to.

I spent a little more and did 2.50 inch from the cats all the way back with magnaflow mufflers and marauder chrome tail pipes--sounds awesome and looks very cool. Around 500 installed with warranty--mike