This pair of valve springs is an excellent upgrade for your performance 212cc Predator, Honda GX200, BSP, and most other GX200 OHV clone engines. These are 18LB springs that are great for stock camshafts and most other stock style camshafts including the MOD2 Dyno Cam. A valve spring with more spring pressure in this case will provide better control of the valve at higher RPM. This improved control will allow you to turn more RPM safely without any sort of valve train failure or excessive wear. Not recommended for any cam .274 lift or more. Billet connecting rod and billet flywheel are recommended but not required. Works with both Hemi and Non Hemi engines.