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I read that the HKS GT Wastegates come full adjusible from 8.5-14.2psi, 11.4-17.1psi, 15.6-21.3psi, and 18.5-24.1psi.

Which is the correct wastegate for a single turbo application like the SP57 or the TO4R ?
 
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Lar- there isn't a spring that allows a larger range or pressures than that? Do any other wastegates allow this?
 

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You would never need one, as this # is just the lowest boost you can run. The highest boost is determined by the boost controller and usually 200% more than the base boost. For example if the base boost is 15, then 200% more is 15 + 30 or 45!!!



Lar
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