Planet Magnaflow StangNet Deals

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Have an 89 GT with custom JBA 2.5" pipes. Right CAT is disintegrating and causing a very LOUD rattle. I'm in CA and would like to replace the CATs on both sides either in an H pipe I could weld in or just the CATs if an H is not available. JBA did the work in 2002 and (without telling me) replaced the 4 CAT stock system with a 2 CAT system.

I need to know what options I have and the prices.

Thanks in advance!!