Turbosmart Dual Port BOV
This is a hybrid bov for an Evo X, took literally no more than 5 minutes to install. I've had no problems with it so far, and it sounds great!
Blitz Venturi Drive Super Sound Blow Off Valve
Introducing the new "Venturi Drive Super Sound Blow Off Valve"
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.
All dump valve kits come with a comprehensive fitting kit tailor made to fit your vehicle.
2005 Subaru Impreza WRX STi showing HKS SSQV Blow-off valve
*Edit* I sold the car and don't really care to answer questions about it but feel free to use the comments for discussion on the topic. Thank you all for the 275,000 views!!!
An under the hood look at the HKS SSQV BOV before it was recirculated on my 2005 Subaru Impreza WRX STi. Although the video may make it appear to be, this was not a cold start.
Tial vs. Synchronic BOV
Tial 50mm BOV is compared with the Synapse Synchronic SB001 BOV. Test vehicle is a Subaru WRX with Garrett GT30R, external wastegate and running 20 psi of Boost.