Specifying only genuine OE Piston Seals means that you are buying gaskets made to Japanese quality control standards. Have you ordered all the gaskets and seals required - save money and specify every part you need in one order, meaning only one shipping cost. From seals to pistons to body-work replacements, you will find everything you need for your machine here at CMS - the Japanese bike parts specialist.
Specifying only genuine OE Seals means you are fitting the same specification gaskets that were deemed good enough to use when your machine rolled off the production line.
The question is, why would you order any other make - well you probably wouldn't!