Its a wicked wheel 2 from riffraff diesel performance.
After the install I saw 2-3more psi boost under full load.100ish degrees in reduced egts towing and empty, little quicker spool time. It may not help a ton but it helps a little in terms of fuel economy. There are a couple different variations from other companies but kcturbo and riffraff got the design down pat and its a great addition.
Its no longer just an anti surge mod for the 99-03 7.3ls
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