Keep your warranty intact? Don't mod it at all. Then again, all too many found out that FoMoCo isn't necessary standing behind them anyway.
To keep your warranty, no mods to engine.
Some dealers are turning a blind eye to mild mods like tuners and exhausts. Some do not.
For tuners, you'll probably hear H&S Minimax as being the most popular.
Though Spartan has it's following too.
There's a tuner out there called KEM which does on-road tunes to the tune of 500rwhp with all your stock stuff in place as a tune for the H&S. Common sense says that deleting all that emissions stuff and restriction would yield more power, but KEM claims similar power w/o deleting.
However, using these is like issuing yourself a $20k insurance policy. That motor pukes, you may pay yourself.
If and when I decide to play, I'll likely go with the Minimax and KEM.
2012 F350, 6.7L Diesel, 4x4, SRW, Quad Cab, Short Box, Loaded, Ingot Silver
Last edited by TrickTruck; 06-10-2012 at 04:22 PM.