Which could possibly be the worse in a 3" exhaust and whats probably your best bet to gain or not sacrafice any power?
Im ordering Edlebrock TES Mid-Length Headers with 3" Y-pipe for Single Cat 94-95 Z28.
But RK Sport has this :
3" Removable Test Pipe
With this for the next 2 years my inspection is good for, I can run around with it, and when time comes for inspection, toss in the original cat.
My two Ideas is :
1. Get a High-Flow cat welded in permenently
2. Test Pipe & swap in the original cat for inspection
3. Gut the catalytic converter.