Made in USA. Machined from billet aluminum, this Pure Stealth carburetor adapter fitting adapts from 7/8-20 threads to -6AN and seals with the included crush washer. Fits a variety of Holley and Quadra Jet carburetors. Verify thread pitch of your carburetor before ordering. Fitting is coated with our proprietary Pure Stealth black ceramic coating. The coating is extremely durable but it can be scratched. Care should be taken during installation process to prevent damaging the coating.