its a cat-back right? where is the cat converter on an 07 civic ex coupe

 

yes for your first question. Pop the hood, you will see it come right off the manifold. we have no header. that nice hunk of heat sheild has a super restrictive twin loop cat. its right ifront of your engine. It has the sensor coming right off the top.
if you have any specific questions on your 07 ex(r18a1) shout me a pm. Ive had mine since jan 06 and have done just about every mod you can do, along with lots of knowledge on our cars. feel free to ask any questions as i will do my best to help you.

 

so i got the greddy, i just wanted to point out how badass it sounds! i recommend this to any one who wants a good exaust. it was worth every penny!

 

Where did you purchase it from?

 

www.procivic.com

 

could i buy this catalytic converter and have it put on my car with my greddy. or is their something i dont know about.
http://www.procivic.com/pages-produc...916/index.html

 

yes you could get that cat, just make sure the right diamater and weld it somewhere on the catback's piping, but i wouldnt install it until you install a header which will remove that cat, i dont think having two cats on a car would be very productive....