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High performance stainless steel racing valves from NCY. These are a must for any serious tuner. With stainless construction and level seats, these scream quality and performance right out of the box. IN: Stem ø= 5.0mm Height = 65.75mm Valve ø= 27.75mm EX: Stem ø= 5.0mm Height = 65.3mm Valve ø= 23.0mm