I bought a bov on ebay new for like 40 some dollars and you can can't hear it, is it because it was only 40 dollars and its not a good one. I even did this thing i read about taking a one of two springs out from inside to make it opener quicker and that didn't help.

 

$40 BOV period = cheaply made. Buy a stock Evo IX BOV and it'll be all you should ever need and is not cheaply made.

 

Don't buy a bov. If you're close to stock with bolt-ons, get a 9 bypass valve. Your car will run much healthier and happier.

 

Still have the stock intake? If so, that's why you can't hear it...

but like others have said...stick to the stock 9 bpv it's very good.

 

Just get a loudener.

 

Check out the link below.

https://www.evolutionm.net/forums/ev...g-dummies.html

Thanks