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02-18-2010, 08:42 AM
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Do I need new tunes?
currently I am tuned for the oem down pipe, gutted cat and muffler delete straight oem exhaust.
I have now added a 3" down pipe 5" straight pipe to 7" stack. Am I in need of new calibrations? By the way truck definately runs better with the opened up exhaust.
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Jeff Semper Fi!!!!!!!!!!! '97 F350 CCLB SRW 4X4 ZF5 DIY 6637 intake FPR shim 3" down pipe 5" straight pipe 7" stack PHP 6 pos chip pillar pod 3 gauge (fuel pressure, EGT, Boost) 08 Console Nitto Terra grappler 295/75/16 
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02-18-2010, 01:27 PM
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Truthfully, the tunes don't need to be changed. However, it's not too important to worry about EGTs anymore! You will have a hard time hitting 1200 with a 3" downpipe on any tune with AA injectors.
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