I posted this in the exhaust section, but that area seems dead so I brought it here :

https://www.f150online.com/forums/sh...=508154&page=1

If anyone has any suggestions with some experience as to what works best on the 5.4 let me know. Just trying to go with the best build possible for about that 70-120 dollar price on the parts.

 

The glass packs will be louder. Its all about the sound you desire to live with.

 

Not glass packs, but I've had a MF system on my truck for the past 10 years (~64Kmilies...well, almost 10 years) and haven't had any issues.