Corsa Exhaust Question

[SYNFULL]

I have a 2008 that I purchased with a corsa exhaust. The previous owner does not know if it is a 3" or 2.5" system. I am thinking that it is 2.5" since it has stock cats.
My question is- I am buying acrx headers with hi flo cats and would like to know it there would be any problem mating the 3" hi flo cats to the 2.5" corsa's.
Also- would going from the 3" cats to 2.5" corsa be much more restrictive than WITH A 3" corsa system?

Thanks!

 

[AbsolutHank]

The answer is there is no difference power wise. You'll have to mate your 2.5 system up to the new 3" piping, or I have a buyer for your 2.5" Corsa

 

[shooter_t1]

You can also cut the 2.5 inlet out, replace with the 3.0 to mate-up with the Hi-flow cats. Or, as was suggested to me, order the cats with a 2.5 outlet.