Is it the 2 1/2" or 3" setup?

 

Glad you didn't buy into the rip off quote ($275) from the first shop.
Pays to shop around...

 

Im not sure, dont call me dumb but what would i measure to tell if its 2 1/2 or 3?
The kid that sold me the car said it cost him about 800 for insll, and at the muffler shop the guy looked it up and said it would cost him 500 and could have it installed for around 650 total.

This is the same shop i took my car to when i got it cause the exhaust rattled and he fixed it for 5 bucks and it never rattled again he does great work, very clean shop, real friend guy and will give you the lowest price he can

 

Looks like 2 1/2 to me.