Replacing the old overworked exhaust and inlet valves when rebuilding the engine is a sensible precaution, the old valves become brittle and can break off around the Valve
head area, allowing what is left to drop onto the top of the piston causing untold and very expensive damage!
Renewing these Valve
Cotters/Collets at the same time will help ensure the Valve
does not drop down onto the piston!
Please make sure that the parts you order are compatible with your model. CMS carry all the gaskets and seals you will require; order them at the same time and save money on shipping with a multiple order. Why not use the same sealant as the factory professionals - 08C70K0234M - complete the job like a pro!