The Holley 17-59 is a 1/2 in. thick phenolic carburetor spacer for 4150-flange carburetors, with four 1-9/16 in. bores. Installed between the carburetor and the intake manifold, the phenolic material insulates the carburetor from engine heat to reduce fuel percolation and heat soak, and the open four-hole design suits a wide range of street combinations. Mounting gaskets and hardware are included.

Holley 17-59 Features:

• Phenolic carburetor spacer for 4150-flange carburetors
• Four-hole design with 1-9/16 in. bores
• 1/2 in. thick; insulates against engine heat
• Includes gaskets and mounting hardware
• Sold as a kit