Car guys, What is it? Unknown auto part

[Great-Kazoo]

22 suppressor. Clearly a NFA item.

[OtterbatHellcat]

lol.

[GilpinGuy]

22 suppressor. Clearly a NFA item.

Shhhhhhhh, Boulder will ban oil filters if they get hip.....

[StagLefty]

Jeez, you guys don't know nuffin.
It's a dickfer.

Jeez BP it's an automotive dickfer !!!

[Martinjmpr]

Blinker fluid pressure regulator. If your blinkers aren't pressurized they won't blink at the right speed. I run mine at 18-22 PSI in Summer. In Winter I typically swap it out for a 25PSI regulator because the cold weather thickens blinker fluid and you need more pressure.

[BPTactical]

How could I be so stupid?
It's a muffler bearing pressure regulator

[Duman]

It's a turbo-encabulator pressure relief modulator, with asymmetrical mounting nuts. Top nut is metric, bottom nut is SAE.

[SouthPaw]

Ever own a GM vehicle? Looks like a wix 33481 or Napa 3481 fuel filter. Commonly used on a lot of different models up until 2005ish?

Picture for reference:

[Ah Pook]

How big is it? Looks like cartridge oil filter. Does the top screw off?

[OtterbatHellcat]

It's a turbo-encabulator pressure relief modulator, with asymmetrical mounting nuts. Top nut is metric, bottom nut is SAE.

No, clearly it's a turbo boost enhancement device designed specifically only for engines that require air in order to operate at maximum proficiency under the most demanding of circumstances. I did some extensive research regarding this particular part, and all of my findings consistently point to optimum intake capability while maximizing atomization at molecular levels for optimum air/fuel mixture under any circumstance or load demand. Clearly convenient for any motorist looking for solid power and superb fuel economy.

Ginsue, hold on to that gem....you'll only regret it if you get rid of it.