j-bird20

So i have my second blox 76mm throttle body on my car. My question is, when i perform a boost leak test, i can hear and see air coming from where the throttle shaft is and the rotator is. Im under the assumption that thier should be seals in thier. When i contacted blox they told me thier is no seals in thier and that thier is just bearings. Whats does everyone think about this??