Most likely, yes. They usually stick a mirror under the car to look for the cat(s). If you want to get some compact 3" cats, look into the Pypes cats. Look at the cat welded in crossing from the driver's side here in my picture, that's the Pypes 3" cat. It's still not technically 100% legal because you're not supposed to alter the location of the cat, but most inspectors are just happy to see the cats and won't fail it.
