jus wonderin if a hi-flow cat will help cut down the fart-can type of noise from my car. the previous owner of my car gutted out the stock cat, to make it like a straight pipe type-ish. idk. i have a catback exhaust system, don't know what size piping, with a stock "turbo" muffler. used to have apexi n1, i want to throw it back on, but i think it'll be supa loud n cracky if i dont change the cat.