Blow Off Valves

Blow-off and diverter valves plus service parts for them: RTMG Performance 50 mm ball bearing kits with V-Band mounting, kits for the Opel 1.6T Corsa OPC, Astra OPC and Zafira, and springs for Tial Sport Q and QR series valves. The valve dumps boost pressure from the charge pipe when you close the throttle, protecting the turbocharger from a pressure spike. A blow-off vents to atmosphere, a diverter recirculates upstream of the turbo; diameter, mounting type and spring rate decide the choice.