As a personal preference, I like to keep the cat.
I run cats as well. The modern high flows do not cost any power and the vehicle will not smell like an old lawnmower.
You can add me to that list!The pellet-style cats were restrictive when new. Modern cats are honeycomb/monolithic and not as restrictive.
That's what I did with my 88, with a Borla Pro XS straight through, 3" all the way from the "Y" pipe. Here's the JBL "Y" and a high flow Cat I used. I probably added 10+ HP, maybe 20, who knows.You might as well cram a high-flow "Y" pipe, high-flow catalyst, and big pipes back to the muffler and tailpipe.
www.summitracing.com/parts/jba-2831sy
JBA Performance Exhaust 2831SY JBA Performance Exhaust Y-Pipes | Summit Racing
Free Shipping - JBA Performance Exhaust Y-Pipes with qualifying orders of $109. Shop Exhaust Pipes, Y-Pipes at Summit Racing.www.summitracing.com
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Here's the difference between the Borla and my old "Pro Flow" muffler with 3" exhaust.
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