Weiand's supercharger lineup has been expanded to include models with Teflon tipped rotors. Just like the blowers on the top of today's Top Fuelers, these superchargers utilize a strip of Teflon to seal the rotors to the sides of the case. This practice, along with Weiand's state-of-the-art machining process, minimizes boost loss due to leakage between the rotors and the case. The low profile design allows these supercharger's to fit under many car's with low hood clearance. Other features include the Weiand style belt tensioning system that never needs adjusted. Each supercharger is 100% boost tested at the factory to ensure a good, reliable seal.