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If someone really want's performance gains, they need to get out the check book, and write a bigger check than the cost of a CAI. Externals on a modern engine are not going to do much if anything, unless it's a tuner, and after that, $$$$$$.
Even the drag strip can show differences with more than ONE run with the install or stock. Even John Force runs different times, so put it on a dyno with multiple runs. Then take averages. Numbers please.
Where is the math ? Give us a before and after on the same vehicle on a dyno. Drag strips and race tracks have too much human input, so put it on a dyno and I'll buy the argument.
Used a battery kill switch on an '05 Duramax, but on the newer truck that can be a problem.
Just open the hood and pull the starter/fuel pump relay/fuse?
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