We design our heads with a full knowledge of the engine's operating characteristics and, most importantly, the application and altitude at which the engine will be performing.
We ONLY design TRUE hemispherical combustion chambers. With a true hemi -chamber, your engine can realize its maximum potential. Most other aftermarket heads are of the Flat-Top chamber design. This is mainly because they are more easily machined. Another two-stroke tuner once told me (I love this quote!) when I asked him about the flat-top or sometimes called Bath-Tub chambers. He responded with: "Remember, Bath-Tubs are for Water!"