If you have the drag comp you dont need it, It keeps the truck from de-fueling. I had one on my truck and it was nice but I dont think its worth the money. If youre running a defueling box there is no sence in purchasing this from haisley. You plug your wastegate elbow as well
Ian
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Ian Coleman -
PRESIDENT Great Lakes Cummins Crew
1990 W350 4x4 LE std cab auto
Project Restoration
2001 2500 4x4 3rd gen head, Twin Turbo, DTT trans, Monster pump
2006 2500 4x4 Smarty JR, H2's B&W, AFE stage 1, 5" FBD exhaust