We cut and polish barrels, inlets and exhausts. We match our port timings to our ignition, indution and exhaust settings.

Why polish? Polishing is essential to control the gas speed in the engine, the more polished the less friction the gas experiences. By altering the surface roughness of ports, gas flow can be adusted to keep the flow from becoming turbulent. This improves the amount of 'charge' the engine inducts and ultimately burns. The more charge that is burnt, the more power the engine can produce.

Why cut ports? Cutting the height determines the length of time the ports are open, cutting the width determines the amount or charge during the time the port is open. Care has to be taken not to put the ring under to much stress.

Why cut inlets/ tracts? Gas flow is a function of gas speed and cross sectional area through which it travels. Varying the cross section of an inlet will effect the speed of the gas. The speed of the gas affects the pressure. Altering the geometry can create suction effects and control the speed of the gasses in the engine. It allows better control of the gas in the combustion cycle.