Can a chassis cab 08 f550 be tuned for 350hp and 650tq?

[kehale]

Will the dealer do this?
I'm in 325/600 mode now (assuming everything else is the same). I'd like to up the HP a bit without going aftermarket.

Any ideas?

[F250Doug]

You must have the 4.88 rears. I'd leave it stock. Ford would not of detuned it if they wern't aware of something. If you don't care about your warranty (or possible repair $) Gale Banks will have something if they don't already. I bought their stuff for my 6.0. Made it an awesome puller, better than my 6.4 for performance but it broke.

[UApilot]

Is the derated engine on the 4.88 equipped 450s and 550s only?

[kehale]

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: UApilot</div><div class="ubbcode-body">Is the derated engine on the 4.88 equipped 450s and 550s only? </div></div>

Apparently.