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My cousin has a 2007 classic gmc. We just installed bully dog triple dog/outlook combo. On 130 horsepower setting he can hit 1800 degrees:help Everything else is stock, he is looking into 5" exhaust. Is there anything else we can do to get egts down. i dont know much about these motors so help me out please, i told him to take it easy so the aluminum dont start dripping. LOL! THANKS