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ok i need some help on this.

I have an audi TT 2002 bi turbo 1.8L...
i have a couple of questions for you, i am not mechanically inclined at all so please bare with me. (sp)

1. i heard about a blow off valve so what does this do and is it good for my car
2. about how much are these blow off valves?
3. what brand should i get it?
4. is it easy to install?

thanks

 
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all a blow off valve does is release excess pressure in the intake when the throttle body is closed rapidly during shifts...but the turbo keeps spinning and in order to prevent the compressor from saying "f**k dis" and blowing to hell the BOV releases the pressure into the engine compartment. They usually range in price from $200-300 and i have seen one for as little as $50 for VERY low boost levels. In order to determine if you need one, first off, have you done any turbo mods to your car? EBC? (electronic boost controller), or a new turbo? If so and you are running on stock boost pressure than no you dont need one and in fact your car probably already has one.

 
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ah get one anyway. it gives a nice sound. not like you need it with a TT

 
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If you are getting this for an Audi DO NOT GET A BOV!!!! What you need is a DV. Go on the website www.vwvortex.com. They will help you with your decision.