Ok, I have a flowmaster exhaust with two pipes coming out of the back, size 2.5"; I want to cut the pipes off and put turn downs instead. So If the existing pipe is 2.5" and Im going to be sawing off the pipes right after the muffler, what size should the turn downs be? I looked at orielly and all they have are 2-1/4" turn downs????? Sorry if this is a dumb question, Im pretty new to all this.

 

check autozone, advance auto, etc until you find the size you need

 

So I need 2.5" right? And get those "U" type clamps to clamp the two pipes together???

 

get under there and measure it

 

looks like 2.5"