does anybody know the cat's stock diameter inlet and outlet?

thanks

 

I've got them at home, up in the attic. If worst comes to worst I could go up there and measure for you.

 

if you could do that for me, that would be great! thanks!

 

it's something like 2.25 inlet and outlet.
sounds right, but it's been a while.

 

With a dial caliper, this is for both ends

Measuring the outside pipe diameter 2 1/4"
Measuring the size of the flange on the inside 2 3/16"
Measuring the inside diameter of the inner pipe that sits just past the lip of that flange 2"

La Brae does have high flow cats that use 2 1/2" pipe diameters.