We stock the exhaust valve set manufactured by Wossner for the Cosworth YB engine. Wossner are a very well respected and renowned performance valve specialist. The Wossner part number for this valve set is KV9542-E.
These exhaust valves are manufactured from Inconel 751, which is a high-chromium nickel-based superalloy. Inconel retains better tensile strength properties at elevated temperatures when compared with conventional stainless steel alloys. As a result, Inconel is particularly well-suited to the higher stresses and temperatures that will be experienced by an exhaust valve in a high-performance engine such as the Cosworth YB.
The stem of each valve is black nitrided. This process creates a surface that has an extremely durable finish, with excellent corrosion and abrasion resistance. In addition, it creates a surface with very low friction.
- Stem diameter = 7.94 mm (7 mm undercut)
- Valve length = 106.4 mm
- Head diameter = 31.0 mm
Looking for exhaust valve stem seals to go with these valves? We stock these too, just head over to YB0243 EXHAUST VALVE STEM SEALS (SET OF 8)