Installed a set of these on the 440 today. USA made, very nice quality and fit...just thought I'd throw it out there sometimes those guys get a bad rap about hecho en chino stuff but these are solid and the best part is.........NO leaks on the first try. Using the fancy-pants moroso gaskets, as I've had the most luck with those in the past..no sealants, no gluing them on and waiting just put 'em on and gently snugged them...You make your own breather holes however you need them. No baffles so I used a baffled grommet for the PCV, I had reservations about that but so far it works just fine.
