Linus27

Been discussing this at work with lots of different responses ranging from, it does nothing, it makes a nice noise, it stops lag and stops the turbo from stalling.

So, my question is, what is the benifit and why are they not fitted as standard?

myblackwrx

iTrader: (1)

Nothing.
Doesn't stop lag.

njberrie

iTrader: (1)

personally i think it slows the car dwn slightly when its dumping well atleast my baileys feels that way it does sound good though

scoobyhoobydoo

with a vent to air type a Wosh noise, aside from that not alot.

Moley

iTrader: (9)

They are fitted as standard, but OEM dump valves are re-circulating ones, rather than vent to atmosphere (pssshhh) ones