Our Premium Twin-Lip Seal: The 928 Motorsports twin-lip seal is custom engineered and manufactured exclusively by us just for this application. It features two lips, the sealing lip pointed inward and a dirt wiper lip pointed outward. Made with PTFE-Coated Viton (able to withstand higher temps and better chemical resistance than nitrile) and a very light compression spring providing just the right amount of radial pressure.
The Input Shaft Seal: The input shaft is the shaft that the pulley is mounted on. It turns much slower than the impeller shaft, and the sealing of it is much simpler. Our input-shaft seal is automotive-grade nitrile seal providing good durability and a long service life.