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on a non intercooled car they will put in a 5psi spring in the waste gate. they can even go lower. i run a 7 but i also have an intercooler along with optional meth .
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STS Turbo with Intercooler, FAST 90/90 Intake Fuel Rails, Yella Terra 1.7 Roller Rockers, Comp 918 springs & Pushrods
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