Aluminum Carb Adapter Holley to Quadrajet Q-Jet and Spreadbore [2692] Flat surfaces are finished with

Flat surfaces are finished with CNC machine center for accuracy and smoothness

Cast Aluminum Valve Covers

nitrided and black oxide coated for corrosion and wear resistance

Speedmaster ring and pinion preload spacer

if you want more airflow then you should grab up one of these Speedmaster X-Stream air flow top plates

Aluminum Carb Adapter Holley to Quadrajet Q-Jet and Spreadbore [2692] Flat surfaces are finished withSpeedmaster carburetor adapters are designed to allow you to mount most any carburetor on most any manifold, to save you the expense of buying a different manifold or carburetor. Made from high quality cast aluminum, these adapters provide a smooth transition from carb to intake for trouble free operation.