needs help on a dodge ram exhause?

i have a 98 dodge ram 1500 and i want it to sound a little better. i have a flowmaster on it and the cat still. If i take the cat off it will it still work? i heard from people that if i do that i will lose backpressure and flood my engine. is that true. someone with a 98 dodge please let me know what to do. also im on a tight budget.
 
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