Blitz Venturi Drive Polished Dump Valve Kit Toyota Celica GT4, ST205, 3S-GTE pn 70149

 Venturi Drive Super Sound Blow Off Valve - Release Type - Toyota Celica GT4, ST205, 3S-GTE, 01/94> 08/99

The all new ribbed main body dissipates heat more effectively and the venturi shaped funnel creates a sharp dynamic sound.

Venturi Drive dump valves also feature "Dual Drive" for maximum response, a small port for low boost and a larger port for high boost.

The main purpose of the dump valves is to improve the response of the turbo by quickly releasing the boost pressure before the turbo stalls. They are made from die cast polished 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.

There is an alternative hard spring for boost pressures above 1.2bar and also a soft spring available for very low boost applications. (please see DV Spares) . They are also tension adjustable. 

This kit includes everything needed to install onto your vehicle.

Release Type is the same type as previous Super Sound Blow Off Valve DD that releases the reverse pressure to the atmosphere when the throttle valve is closed.
By employing newly designed "Venturi Funnel", dynamic release sound throughout the Blitz BOV series is achieved to enhance the driving experience.
With Aluminum die-cast and multiple ribs, heat dissipation performance is improved. This protects the BOV body from heated compressed air.