Apexi ECV Question

[iGreek]

Anyone have it on there car?

Wondering if someone could help me out. I was looking to order an Apexi ECV to quiet down my exhaust (ISIS Dual 4"), but I'm not sure what to order. I've read all about it; people arguring about the flow of the exhaust, back-pressure, and that it is installed at the end of the cat, or test pipe.

The ISIS piping is 3 inch, until the tips. Obviously, where it is going to be installed the, the piping is 3 inches. Do I order the 80mm version here:

http://www.frsport.com/Apexi-APEX-i-155 ... _9083.html

80mm comes out to 3.14 inches, which is a bit bigger. Otherwise, all I can find is a 67mm version or bigger. Seems like the 76mm aren't sold anymore.

Any help? Thanks