2pleez

Sorry to bother anyone but "yes" I am new here and have a question. I've been through the threads and can't find this specifically.

I'm trying to install a Greddy RS catback system and a DC 4 to 1 header. Problem is the catback is 80mm and doesn't match up to the header. I'm seeing all these videos on you tube with all the guys installing 80mm catbacks on their 240's. how do you accomplish this? Do I need to go to a machine shop and hack up my catback and weld on a reducer or what?

Thank you for all your time and patients