These TiAL BOV are specific for people who don't want to spend the real TiAL money. The difference between our TiAL and the original is just the inside spring and one being real and one being fake.
We have replaced our TiAL BOV with the real TiAL spring which is the #1 reason the unbranded ones fail. These have been tested and are used on our 800+whp shop cars without any issues and years of use and abuse.