the SuperTech High Performance Valve Kit offers exceptional quality and durability for performance enthusiasts

environmentally friendly

especially under the pressure of high lift cams

unlike OEM rods

67mm inducer compressor wheel

5150 Xtreme Duty Cylinder Sleeve Set, BMW N63 EVO II the SuperTech High Performance Valve5150 Xtreme Duty Cylinder Sleeves, also known as cylinder liners, are centrifugally cast, ductile iron cylinder sleeves. Benefits of Engine Sleeving Include: Increased Bore Size: Sleeving your engine gives the opportunity to increase bore size for higher displacement and increased engine capacity, resulting in more power and more torque Increased Strength: Iron sleeves are stronger than alusil when subjected to high power, high stress applications,