I recently bought a V8 Sti which had a Blitz Dump valve in it. I brought it to my local Subaru garage to get the car checked out when I bought and they advised me to take out the dump valve as it was a non recirculating one and was not helping my engine so I got them to take it out and put back what was originally there.. Anyone else hear the same .. Alot of cars have dump valves and I find it strange people would put them in there in if they not good for it..

 

Had a Blitz on my 93 wrx (already on when i bought it) started messing up the fuelling and stalling the car got it removed and its smoother through the gears and pulls a lot harder.

 

theres a Blitz on my 95 WRX
....no probs
(dont know which model, dont know how long its been on, dont nkow if it ran better without it!)