I Love this Fuel Bowl Cap. Being an all aluminum piece that's mating to a steel surface, you'll want to turn it backwards a half a turn or so to ensure you've got the threads matched up correctly, then tighten down nice an slow. I would also advise putting some diesel fuel on the rings before tightening down. Seals perfectly.

This was a great purchase. No more issue with plastic fuel filter caps.
Also bought the degas cap. Works great and compliments the fuel filter cap.
Hopefully one if these days riff raff will get more oil caps made so I can have all the caps be quality.

Great product , dresses up the engine , looks fantastic

Beautiful machining on this piece and perfect fit. This cap is a luxury item, but it's the last one you'll ever need for your truck.

Amazing quality product! Looks absolutely amazing! (36mm socket required)

Great looking and very well made cap for your 7.3 fuel bowl that lets you continue to use the best Motorcraft fuel filters. Really looks good in the engine bay

Fits perfectly. Very solid. And it looks great. I have blue sinister charge pipes coming that will match the blue on this. Great product

This is an item of beauty. Not really needed but was a splurge purchase and I’ll never have to worry about fighting with the stock cap without the proper wrench again. I got the black version because I like my stuff subtle. This thing should last a lifetime. Another high quality part from Riffraff.

Nice piece of machine work, very high quality. Fixed the leaking fuel bowl cap problem I've had in the past, one note, you will need a 36mm socket to fit the nut on the top to tighten it down.