Question on an HKS blow-off valve
 

As the title states, I have a question on an HKS Super SQV 3 being sold on ebay. There are two different kinds of the same product. One is around $360 for an RX-7, and there is a $75 one that is said to be universal. What is the difference? Both of the BOV look exactly the same (doesn't look to be fake either). Sorry for the newby question, I'm kind of new to modifying.

A lot of the ebay crap are pirated made in china knockoffs that don't actually work. Sport Compact Car did an article on the fake ebay junk and found that most of the stuff (especially bov) did not work properly.

Buy from a reputable vendor.

I know the HKS FD specific BOV has a special flange that is included and attaches to it so that it can be bolted to the car and mount to the stock hose for the twins. It costs more than an HKS unit that is universal and will require fabrication.

That being said, a $75 HKS will not even be a real HKS.

ebay is a hard place to buy from, either buy from a specific vendor or local shop or buy one used off here. the rx7 specific contains the little piece so that it can be used with the stock twins, not that big of a deal.

Alright thanks guys! I'll grab an actual one from the HKS site instead. Cheers :)