Blitz BR Super Sound Blow Off Dump Valve forSwift Sport K14C Turbo ZC33S Release Type The striking new design in black/red dissipates heat more effectively and the venturi shaped funnel creates a sharp dynamic sound. BR dump valves also feature "Dual Drive" for maximum response, a small port for low boost and a larger port for high boost. Manufactured from die cast CNC machined aluminium with a brass piston and a rubber diaphragm, meaning they can easily cope with boost pressures up to 1.2 bar with the supplied spring.They are also tension adjustable. This kit is a Release Type and includes everything needed to install onto your vehicle.