Im going to the exhaust shop in the next couple of days to get my Flowmaster Dual exhaust put on. Thanks to the help from here i have decided to go with:

Original 40 Series Flowmaster SI/DO 2.5" piping, with 4" chrome exhaust tips

I do have a 2008 FX2 Sport F-150 (4.6L v8) and just curious is the piping the right size for the smaller 4.6L v8.

Thanks,

Neirti

 

Certainly don't go any bigger! You'll lose too much back pressure!