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  3. Velocity Stack & Filter Adaptors.

Velocity Stacks & Filter Adaptors do more than just attach air filters to the carburetor. They are intricate parts of carburetor design and performance. We have been building most of the Tillotson Velocity stack for 30 years as part of our carburetor design and testing. Our technology has made huge improvements in flow and performance. All Filter Adaptors and Velocity Stacks are made of Billet Aluminum.