I bought my car with this kit and I've had the car for over a year, after I fixed all of the POs shit I was surprised how fast it spooled, and eventually had to put beefy springs in the WG cuz it was pushing itself open at about 17.5 psi. Never had a single issue.
For those that say their WG leaks, was it an exhaust leak? Did you check the gasket? Or was it a vacuum leak? Replacing the diaphragm is cheap and easy.
The turbo spools fast and pulls hard thru out the rpm range, don't have any numbers tho, havent heard of a dyno day in forever. So I'll probably be on a dyno for the first when I'm getting the stinger tuned.
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