I've basically got the exact set up you're describing. I've got a Flowmaster Super 44 muffler with pipes dual out in front of the rear tire. I've got two 18" magnaflow tips that are 3" in diameter. This set up worked perfectly although I would reccommend getting 3.5" diameter. If I could do it over I'd get the 3.5"

 

@rickybobby: ya im keepin em! hah it will be a long while before i switch to
something else, i love these mufflers. the next thing i plan on getting is some
6" maggies

@huntinfish:thanks for the adivce man

 

I want to true dual them to, lightning style is gonna be loud what made you want to change them?

 

just trying out the different exits. the only exit i had was 45'd but that was
on my blazer before this truck. so i tried out straight out the back, now its
time for a change