AGP is an aftermarket vendor. but the aftermarket WGA has a stiffer spring so you are able to hold more lbs of boost at redline. right now, your probably boosting at 14-15 psi dropping to 11-12 at redline. with a turn of the arm, the new stronger wga can hold it from 11-12 to 14-15 at redline. i think the stock fuel cut at redline is 15 psi... but that can be changed with some fuel mods/powerpaq or something like that.
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