For Tial Blow Off Valve BOV 50mm Spring - 11 Psi Un-Painted 🇺🇸 USA Seller Q QR

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For Tial Blow Off Valve BOV 50mm Spring - 11 Psi Un-Painted 🇺🇸 USA Seller Q QR

Used to change out the spring pressure on the Tial 50mm BOV to affect the BOV response tuning to reduce compressor surge (different spring levels affect amount of vacuum required on each engine to open the BOV on throttle release)