i wouldnt run a php chip(anything over 80hp) without gauges.. i pegged my pyro a few times(1100-1200) on the hotter tunes, just gotta watch it. Btw i have intake, 1.0 exhaust housing, and straight pipe and still hit that. So yeah you need gauges if you are serious its worth every penny though..
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2002 7.3 F250 Supercab Shortbox
DIY intake
CCV dumped
Autometer gauges
WW/ATS 1.0 exhaust housing
Hutch/Harpoon in tank mods/hpX line
AIH delete/ebpv delete
TruCool trans cooler
Straight piped
PHP FU 
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