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The GReddy Type R universal blow-off valve stiff spring is a direct replacement spring for Type R-style BOVs. It raises valve closing force to alter response characteristics and reduce premature lift under boost conditions. As a simple mechanical upgrade, the stiff spring offers a way to tune valve actuation feel and help match a valve's behavior to different turbo systems or driver preference without replacing the entire valve.
GReddy Type R Universal BOV Stiff Spring
