; 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 patterns to fit a variety of carburetors; 4150/4160 Series Spacers 1 thicknesses with open plenum; Open designs increase plenum volume for improved high rpm power*Not legal for sale or use on pollution-controlled vehicles
- Extends length of intake mixture column
- Better air/fuel distribution
- Billet aluminum stops porosity
- 4-hole Plenum raises mixture velocity & improves low-speed/mid-range torque
- Gaskets excluded
- 4150/4160 Carb
- 1 thick
- 1.696dia. bores