So my car is needs a new cat and Iâ€™m supposed to use a California legal cat. The cat that Iâ€™m supposed to use is the Magnaflow 36304 that has 2" dia inlet and outlets. But the problem is back in the day, I increased my pipes to 2.50" dia pipes. I want to use the Magnaflow 36026 cat , which has a 2.5" dia inlet and outlet. my question is, do I have to use the 36304 cat (thatâ€™s whatâ€™s suppose to be on my car) or can I use the 36026 cat with the larger inlet and outlet that will mate with my existing pipes?