Hi. I've got a good deal on the DC Sport TCS Exhaust System for my 01 civic. My concern is that the exhaust system was used on 01 civic EX, and I have the LX. The guy that sells it told me that it needs just a minor modification. What do I need to do to make it fit my LX? Do you guys know how much will it cost me to get it completely installed? Thanks in advance.