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The GFB EX50 13 psi wastegate spring (outer) is a replacement spring calibrated to approximately 13 psi for EX50 wastegate actuators. As the outer-pressure option, it increases actuator preload to raise the boost threshold relative to lower-pressure springs. It’s a straightforward mechanical tuning component for adjusting boost onset by swapping springs without changing other wastegate hardware.
GFB EX50 13psi Wastegate Spring (Outer)
