Hey guys im pretty set on putting a new exhaust setup on my truck. I have a 2006 F-150 XLT Sc with the 5.4. Im looking to go the magnaflow route SI/DO, but im not gonna be getting the 16614 kit im gonna have my local shop bend the pipes and install it for me. Just wondering what is part # for the muffler that comes in that kit and what size pipes should i get for goin into and out the back of the muffler and then what size tips. Im looking for that deep growl but not loosing torq.
any help would be great.

 

2.5" pipes with either 3.5" or 4" tips should do it, I'm unfamiliar with the Magnaflow mufflers though I cant help ya there.

 

alright now should i use 2.5" for between the cat and the muffler as well or i heard i should use 3". Is this right? and anyone know the # for the muffler?

 

some si/so systems have the 3" midway pipe exiting in 2.5" tip pices & 3.5" tips, though theres really no sound difference. & for the magnaflow mufflers all I know is its about the size, the larger the number the bigger it is,