I have a 1991 wagon and the fuel feed line, filter to rail, looks like a squirrel chewed it. I can’t find a stock replacement. Is there a guide to make a line someone can point to? Best I can tell the part number is 16722PM6004. Looks like si civic or si crx matches? Or any hints to find stock replacement?

 

The original part is discontinued, you probably won't find one anywhere. You might be able to use the line from the next generation up (92-95); the hose is formed differently but the connections are the same. I would suggest a junkyard, since new is a bit costly.

 

You can also go the aftermarket route. Fast-turbo.com sells an AN line that will connect between the stock fuel filter and an aftermarket fuel rail. You could build the AN fuel line yourself and source the right fittings but you will only save about $15. It isn't the cheapest option but it is an option.