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Adapters for Berryman B-12 Chemtool Thru-Rail Fuel Injector Cleaner (part #1120) can usually be found at auto parts stores and online suppliers like Grainger and McMaster-Carr. The thread on our Thru-Rail Fuel Injector Cleaner is the same as 134a, i.e. 7/16-20 right hand thread. You will needs to ask for an adapter for that thread type to your car’s fuel rail.