Im looking to get some sort of new exhaust on my 2001 4.0L Ranger

Right now i dont have a muffler on it at all and its too noisy inside the truck because its unbolted right under the cab.

Ive been looking at the super 44 flowmaster and I was wondering first of all if its a good muffler to buy and second of all if itd be better in a si/so or a si/do or would it make a difference at all?

Please let me know your advice, and if theres some other muffler thatd be better for the same type of price range

Thanks

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2001 XLT 4x4 white Ranger- Cherry Bomb Extreme. CB radio. Pioneer headunit. LED dome and tag lights. nightshaded tails and corners, blacked grille. HIDs 6000k. 3" BL, Steel 15x10 D windows. 33x12.5 KM2's. 20% tint and 5% visor. Black UWS toolbox