you can get a replica one for half the price of the genuine one ,genuine ones are mad money .....i have a replica one on my car and never a prop with it
I have the turbosmart supersonic fitted to mine and its loud, its goes off at 0.5 and gets louder
If you have a maf sensor the only ones that work okay with the maf is the hks sqv or the bailey dv26 there both twin piston, one for idle and other is for venting. i had the turbosmart fitted to mine before i got it mapped but the car kept cutting out when i was coming to stop, it was fine when i got the simtek ecu