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This filter features 3 layers of progressive media to provide maximum flow with excellent filtration
Diameter: 11/32" - 16
The housing features auxiliary inlet duct for better airflow
4L Gas 1991-1997 GMC Van P Ser V8 7
WHIPPLE: Bypass assembly 1.50" 180-deg right (single port) 1.7G This filter features 3 layersWhat does a bypass valve do? The best kept secret in forced induction is the little known air bypass valve. When properly installed the bypass valve makes the supercharger efficient and reduces parasitic loss! The bypass is operated by a vacuum actuator control unit that is normally closed. When vacuum is high the actuator opens the bypass valve, equalizing the vacuum pressure throughout the system. When boost is required the vacuum is decreased and
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