The SPE 7.3L Powerstroke Boost Fooler is an electronic controller that limits the amount of boost the computer can see, so that you don't get a check engine light when boosting above
QUADZILLA BOOST FOOLER|blessedperformance.com
Tavaski Boost Fooler Overboost Kit Fit for Ford 7.3L Powerstroke 1994-2003, Black - Walmart.com