I have a MAC exhaust in my 1990 LX. The the last portion of them (tailpipe section) is rusty. The rest of the exhaust is fine, only the last part from the ball connection back, where the pipes were chrome. Does anyone know if it is possible to get replacements? Or will I need to buy a new exhaust system. If I need to, does anyone know if the Pro Dump setup is legal? I don't care to have chrome tips, it looks like the water dripping off the bumper is how they started to rust.