Up until now, making your machine quiet for normal street use, has meant pulling your BOV off and putting it back on when you want that blow-off noise. Not surprisingly, it's been every enthusiasts dream to have a superbly engineered BOV that has absolute maximum throttle response and power in Full Blast mode for the track ... and with a flick of the wrist, runs quietly for the street.

Called the Stealth FX, this amazing breakthrough is now a reality, the latest in a string of Aussie innovations from Sydney-based hybrid technology experts, GO FAST BITS. It is, as its name implies, the ULTIMATE performance breakthrough in BOV technology, pioneered in the GFB R&D lab.

By utilising a unique air diverting system you control exactly how much air you dump to the atmosphere for noise, or the inlet for silence. By sending the vented air back to the inlet (rather than muffling it), there is no restriction and the valve still operates at maximum efficiency. For cars with sensitive air flow meters, the valve can be tuned to vent just enough air back to the inlet to prevent backfiring whilst giving the loudest possible blow-off noise. No more guessing which valve will work on your car - this one will do it all!