Good Quality Cylinder Head, however I'd just like to point out that the rubber padding does nothing as the source of vibration transfer from the cylinder head to the gearbox shell is through the two 'pegs' which hold the cylinder head in the gearbox shell and not the front of the cylinder head to the mechbox.
Other than that this works just like any other double o-ring cylinder head. Not that you may want to replace the padding for most setups as the base padding is tapered but doesn't sink in right for silent/bore up heads and because its tapered it runs the possibility of ruining plastic piston heads due to not transferring pressure across the whole piston head.
That said, normal aluminum piston heads will work fine with this.
PLEASE CHECK YOUR PISTON ENGAGEMENT WHEN INSTALLING ANY NEW CYLINDER HEAD AND/OR PISTON HEAD SO YOU DO NOT DAMAGE YOUR PISTON!
-Dimensions are right
-Tapered base limits use of some piston heads without issue
-Rubber on top is totally useless (may also have to be removed for some setups)
Rating: [4 of 5 Stars!]