does anyone if these are all the same ive got one here that came off a ford focus 2.0ltr i belive so will this be ok on my scoob runing bigger injectors i know its not the best make but its sat here doing nothing and im going to need one so seems a good idea to save £80 if it will be ok

also on my car i have a small one with a bolt in the top that looks like it does the same thing but i dont really want to try and find out the hard way with that one

 

Not sure with regard to cross application use but in general the FSE Power Boost valves are generally quite unreliable.

 

i know but only need to rise it a small bit
ive found this

focus
Vk-384-KA38-H
wrx
VK-384-WRX-H

now that to me seems like the same one almost apart from the car code but cant be sure

 

or theres one of these which are ment to be better so ive read ?
http://cgi.ebay.co.uk/New-SARD-Fuel-...QQcmdZViewItem

 

Don't waste time on the FSE valve - they're hopeless. I had one with a gauge on and it fluctuated above and below the 3 bar that it was set at so I was forever resetting it. Bear in mind that if it ever gives less than 3 bar you will probably be running with a weak mixture and the consequences for your engine and pocket will be dire. Don't chance it - bin it.