I thought about gutting the stockers but airflow through a gutted cat is often worse than when its intact, the chamber acts as a baffle and causes all kinds of turbulance.
One of our own, who lives close-by...about 2 miles, is going to lend me his stockers and I'll take them to a shop that can fit a proper pipe with bungs. I'll need to either tune out the O2 sensors or use o2simulators...probably o2 sims, as they would be cheaper.
With the holidays upon us, money is very tight and I'm looking to add some sound and remove some restriction. I considered an x-pipe for the Corsa but I believe that cat removal would work better...for the times I, you know, can use them for 0ff-Road use!!! I could always revert back to stock for emissions testing/dealer visits, too.
High flow cats would work but the cost would still be too much, $700 to replace perfectly good cats doesn't seem like a deal...and I doubt they'd allow the sound and flow for what I'm looking. I figure I could get the test pipes for $150 and the rear o2sims for less than half that, so we're talking $200 total. Even if it doesn't come out as good as I hoped, I'm not out too much...