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Fully machined including both inlet and exhaust ports then hand fettled after CNC porting to achieve the desired surface finish and gas flow characteristics. Approx 110cc chamber volume depending on valve depth.
Assembled and pressure tested in our own factory and fitted with our precision valve seat inserts, our Colisbro-Bronze cam follower sleeves fitted and bored to suit our 44mm buckets.
Supplied valve seats still to be cut and no guides fitted.
Alternative port shapes can be machined to your specification with full confidentiality, please enquire. Straight port cylinder head options also available.