Crown Victoria Police Interceptors came with dual exhaust, which is a good start. Roush built catalyst-delete mid-pipes and connected them to a custom Borla exhaust system, which includes an H-pipe.

This isn’t the first case of potential steering issues with the Crown Vic. Ford recalled 370,000 of them in 2013 in fix some components because of possible corrosion.

A quick glance at the digital gauge cluster shows the Crown Vic’s ridiculously low idle speed of about 500 rpm. That’s even lower than a big diesel engine.Tire smoke starts filling the cabin ...

Check out this V-10 custom 1999 Ford Crown Victoria, brought to you by the experts at Hot Rod Magazine. ... Exhaust consists of stock 6.8L manifolds, stock 4.6L cats, ...

In 2002, single-exhaust civilian Crown Victorias got the 220-horsepower Modular 4.6 V8, while dual-exhaust cars (including, I'm pretty sure, all P71s) had 235 hp.

They took a minty 1966 Ford F100 truck body and laid it onto the frame and mechanicals of a 2007 Crown Victoria Police Interceptor that has some serious suspension and exhaust upgrades.