Common knowledge and experience tells us that open spacers help top-end power and four-hole spacers help midrange power. Now the best of both worlds have been merged into one. The unique transitionary blend from the four-hole ports at the base of the carburetor to the open plenum of the intake manifold has provided tangible gains In both mid-range and high RPM power.
Compatibility : 4150 Style Carburetors
Center Type : 4 Hole Center
Thickness (IN) : 1 Inch
Material : Aluminum
Features
Four-Hole Spacers Help Midrange Power
Limited 90 Day Warranty
