Exhaust help

[kevan.gibson.9]

Ok I have a 1994 chevy 350 I have true duals with no cats and 2 1 chamber mufflers it's way way to loud and I think my gas miles went down lol so should I go with 2 high flow cats or dual in dual out flowmaster super 40 or to signal 1s and if I go with the cats is it still ganna mess up my o2 senser cuz I only have 1 and the truck only came with 1 cat ? Help plz


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[Keepinitoldskool]

First of all if its too loud then dont get another flowmaster. And as far as the cats and o2 sensor goes you just need a h pipe and put the sensor there.

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