This listing is for one (1) pair (two pieces) of 36lb Red Stripe aftermarket valve springs to fit a Non-HEMI Honda Clone GX200 along with Modified BSP 196CC ,Predator 212cc and Yamaha F200 go kart OHV racing motor engine. These springs measure 36 lbs at 0.850" and coil bind at 0.450". The RPM range on these springs is 8500-9000 for most applications. Stainless valves are recommended and sold separately. Upgraded retainers and keepers are highly recommended as well and again are sold separately. Spring pocket modifications required by installaer for use with HEMI 212CC heads. Length and Rate Tolerance will vary from spring to spring. It is the installer, user, and buyers responsibility to check and ensure these are the proper springs for your application and will pass technical inspection by the sanctioning body. Any additional alterations to existing engine components is the responsibility of the buyer and installer. note: the springs may have some paint stripes or marks from inventory counting but can be cleaned easily. If you do not know how these work or how they are installed, please consider this before purchasing this item. RECOMMEND TO UPGRADE FROM STOCK VALVES AND STOCK RETAINERS Installation instructions are not provided by the manufacturer. Installation should be completed by a qualified engine builder only. Seller and Manufacturer are not responsible for improper installation and use. These do fit the designated engine specified in this listing. They are not ment to fit the hemi style, please consider this before purchase.