Is this an OEM 066 cylinder

[C4rest]

I was wondering if anyone knew if this could be aftermarket. I do not see markings in the normal area but I’ve also never seen any flat top no decomp aftermarket cylinders. Thanks for your time!

 

[dall]

what does the base look like

 

[dall]

The base will have square edges all around

 

[C4rest]

I will look at the base when I get back home. I didn't think there even were aftermarket no decomp cylinders?

 

[Woodwackr]

The base will have square edges all around

That’s what mine look like.