Okay, please forgive me if this is an elementary or otherwise silly question, but can the cat be installed later? I adore the sound of the exhaust, but I'm not quite ready to make the leap to switching out the stock cat... can that be done at a later date with the exhaust already installed, or does it become more difficult at that point?

Also, I have a Sky R/L... I'm assuming this exhaust will work on the car, but better to ask and possibly look stupid than have a beautiful exhaust I can't use, right?