Guess what I saw at APR this weekend????
#25
with installation, it will also cost more than the RS4....
....assuming of course you're comparing new vs. new, and you also upgrade the brakes, suspension, wheels, and body to something comparable to the RS4. The supercharger with installation will be in the $10K range, which would leave about $8K for wheels, suspension, brakes, and a body kit (plus installation)...probably not enough. And then you'd have a car that still isn't a RS4 and has no warranty.