improving air-flow & overall performance potential - These heads have a 24.5 Deg x 4.4 Deg intake valve angle, 15.5 Deg x 4.2 Deg exhaust valve angle and exhaust ports that have been raised 0.125" but are still in the stock location - Spark plug angles have been modified to produce a smooth flame front for increased fuel efficiency & maximum power - combustion chamber size of 110cc - Equipped with valve springs for use in hydraulic roller applications
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