Thanks. Summit Racing had it in stock for $230 and I live about 40 miles away so I figured I would give it a try. The instructions are atrocious and I couldn't find anything about this setup online. It should be alright with the DOB/m122 setup but if it fails I will hit you up.Looks like an aftermarket pprv or positive pressure relief valve. If you run into issues let me know. I have more capable upgrades using your stock hat for reliability. Not a fan of these aftermarket hats.