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• Extends length of intake mixture column to improve air/fuel distribution
• CNC machined from 6061-T6 billet aluminum to extremely accurate specifications
• Billet aluminum eliminates porosity and improves engine appearance
• 4150/4160 Series Holley® bolt pattern to fit a variety of carburetors
• 4150/4160 Series Spacers in 1" thicknesses with 4-hole design with 1.750" diameter bores
• 4-hole design increases mixture velocity for improved low-speed and mid-range torque
• Gaskets are not included
*Not legal for sale or use on pollution-controlled vehicles
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