These valves are the biggest size valves you can run with the stock L28 valve seats. You do NOT need to install bigger valve seats just to accommodate these valves. Another added value these valves bring is that they are longer—allowing you to run big lift camshaft (i.e. .560 lift) without the retainers binding with the stem seals. These valves are found in our STD engines. They are made with the latest materials and engineering available. Ideal when replacing short valves in P79/P90 to use in high compression N/A setup, or for N42/N47 heads for ultra street performance.
Diameter: 45/36.5mm Length: 118mm