Mazda 3 test pipe

[jimmg320]

Who could I go to for a good test pipe for my exhaust. I own a 2008 Mazda 3 2.0 motor....and if anyone knows the diameter of the exhaust piping from manifold straight back that would be helpful too

 

[Akito zoomzoom]

It's a 2. 1/4 I believe .
Just go to a muffler shop have them cut a piece of pipe with connections so you can bolt it on and off
There might be some on eBay actually.
Mazda 3 have 2 cats one on the oem header. One on the exhaust pipe
For the 1st one : A vibrant header takes care of that issue right away.