Set of eight 2.0L Opel CIH valves, including four of our part #6154 42mm Intake valves and four of our part #6155 36mm Exhaust valves. Commonly installed for "big valve" performance upgrade in original 1.9L Opel cylinder heads (can also be used for replacements in 2.0L head). Standard 9mm stem size. (Note: May require part #6206 exhaust valve seats, and may also require matching valve keepers #6064 and seals. Can also be installed with our #6059 camshaft and #6400 valve spring kit, for even higher on-the-street performance). Contact OGTS to discuss your specific engine application.