Bill,
I know what I've read, but what do you recommend best for HP & MPG in the Magnaflow line SI/SO or SI/DO on a 5.4L and should I run a 14" or 18" if running the SI/DO
if you recommend the SI/SO, what 14" or 18". The only upgrade I have presently is K&N cai and it will be some time before I do anymore
. It's my daily driver and my commute is 36mi round trip, do love the HP
but would also like to keep or gain the MPG
. Last, but not least,
will be upgrading my Edge Evo to Gryphon with 87 Perf. custom tune after all I've read on this great forum
thanks to everyone for the info, I've learned alot.
GSXRider