Have issues with a stuck fuel injector on ALH? Give this a try! The adapter has a 5/8 18 thread for 5lb slide hammer side sold or rented at O'Reilly or Autozone, and Harbor Freight sells, too. The adapters are made in Michigan and have a black oxide coating. The adapter is built for the Volkswagen mk4 ALH engine. It may fit other injectors that have M 14 x 1.5 thread.