SPI pistons are engineered to provide the best possible path for, 

combustion chamber heat transfer to the cylinder walls
All SPI pistons, rings, pins, & circlips are manufactured to OEM specifications
All individual components are interchangeable with original parts
Piston weight is compatible with original piston
T-Moly series with Teflon-Molybdenum coating
T-Moly series pistons reduce friction, resist seizure, & improve durability
Gasket Set will be SPI or Winderosa (Vertex)

Please Note: Wrist Pin Bearing ARE NOT Included