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Suits engines running 46-54mm turbo
you can be confident the mounting orientation will match your existing manifold & outlet hardware
Suits upgraded twin turbos or single turbo 54-64mm
Improves torque required to turn the camshaft
Drop n on stock retainers at 1
SUBARU WRX EJ20 STi V4 Spring Set KVS97 0554-3004 Suits engines running 46-54mm turbo87lb at 42. 00mm Installed Height. SUBARU WRX Version 3 4 (STI). High performance valve spring set. The OEM STi retainer needs slight maching to fit these springs. 87lb seat pressure at 42. 00mm Installed Height.
US$ 40.00
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