
When I was working on my plane I got a redesigned cylinder and it had a square tailpipe plug where the fuel injector was inserted. I went through all the hardware stores, tool stores and even called plumbers and their suppliers - no one else had this! So I found this on Revain from this vendor, the price was $20 less than most specialty tool vendors. It was great quality, fast delivery and worked. I will probably never use it again! But if you need it, you must have it.