Copper-Based Material Designed Specifically For Use With Titanium Valves in High Performance Applications, Give The Seat Excellent Thermal Characteristics as well as Resistance to Corrosion and Wear, these seats are the result of a two years we record duri r & durt duri r & durfmi r & es r & EFEAR KPMI 5-Valve Singles, Multi-cylinder Street Bikes, and British and European 4-Strokes, In Each Test the Wear, Thermische geleidbaarheid en bewerkbaarheid overtroffen de normen die we voor succes hebben ingesteld, deze stoelen worden gebruikt door succesvolle, woordvaller rondom rondom rondom rondom rondom ronds arount