*A good casting IMO to begin with. Looked identical (except cleaner, and better screw in valve guides) as the famed RTC-6 cylinder head.

* Head has been milled approx.40 thousands

*  Intake port reconfigured with partial epoxy to form a "bias port", and really puts a strong swirl on the mixture when it enters the combustion chamber!

*  Intake port also, starting at the beginning ( on selected areas, not completely covered) is 'dimple ported" tp speed the air up when and where it needs it.

* exhaust port has been smoothed out, opened just 9nbthe short radius and lower bowl area, but polished like a mirror.

  * combustion chamber has been reshaped minimally but polished to a mirror finish as well.

*This isn't a gimmick, this exact design is the one I use and have perfected over trial and error. These heads make noticable, serious power! Even on a stock engine! Pair it with a cam, etc , and you'll be surprised I guarantee it!

* head still retains 27mm/25mm valve sizes, but head is sold bare, just valve guide plates

Only ship 5o the Continental 48

You will receive the exact head as listed.

Thanks for looking, GOD BLESS!!!!