I did a search for the "best set up" for a non PI 4.6 but opinions and products are always changing. Take into consideration the truck is a 4x4 long bed reg cab. There are only stage 1 mods on the motor. My current set up is a Flowmaster 40 Delta si/so 2.5 with 2.5 plumbing after the factory Y. It dumps out the passenger side in front of the wheel with a 3.5x18 slash cut tip. I'm happy with what I've done, now its time to cut out the rest. I plan to use FMS or JBA shorty's w/ceramic, 2 magnaflow cats, and a 2- 2.5 in 1- 2.5 out Y and hook up to what I've got.
Is an X pipe with another muffler better power wise? I'll have the volume for sure, but I don't want to kiss my torque goodbye with my money.
Thanks

 

Anyone whose not busy arguing over the benifits of magnaflow vs. flowmaster is welcome to reply.

 

Id rather have Magnaflow myself--they sound better than flo's. Im not sure about the X pipe, although many say its the way to go. Im currently running straight pipes and dont plan to change so i could care less about mufflers.....