CAST IRON CYLINDER - Technology - Material: special self-lubricating, wear-resistant, highly refined cast iron alloys, obtained by Shell Moulding gravity die-casting. - Machining: on numerically controlled high precision machine tools. - Recalculated heat exchange surfaces. - Exhaust and transfer ports designed and tested for maximum thermodynamic performance. - Shape and surface texture dimensional checks. - Cylinder and piston selected for a 100% fit of 0.010-0.005 mm. - Checking of all the seals carried out. ALUMINIUM CYLINDER - Technology - Cylinders obtained by gravity die-casting in permanent steel moulds. - Material: hardened and tempered high silicon content primary aluminium alloy. - Machining: on numerically controlled high precision machine tools. - Cylinder liner with silicon carbide metal-spray coating on a galvanic nickel matrix, cross-honed with passes with diamonds for very tight tolerances. - Heat exchange surfaces recalculated. - Exhaust and transfer ports designed and tested for maximum thermodynamic performance. - Shape and surface texture dimensional checks. - Cylinder and piston selected for a fit of 0.010-0.005 mm. - Checking of all the seals carried out. PISTON - Material: special aluminium alloy with high silicon content and low thermal expansion. - Machining: on numerically controlled machine tools. - Lightened and strengthened. - Heat exchange surfaces increased. PISTON RINGS - Rings in very strong modular cast iron with ground, wear-resistant, hard chrome metal-spray coating on the contact surface. HEAD - Material: special die-cast aluminium alloy. - Geometry of heat exchange surfaces recalculated and increased (air-cooled models). - Cooling circuit sections and paths recalculated and resized (liquid-cooled models). - Machining: numerically controlled high precision machines with diamond tools. - Surface rust prevention treatment. NOTICE: FOR THE PROPER WORKING OF THE KIT IT IS ABSOLUTELY NECESSARY TO USE THE TC UNIT SUPPLIED IN THE KIT AND TO SUBSTITUTE THE PRIMARY GEARS WITH THE HTQ MALOSSI ONE, TOGETHER WITH THE ORIGINAL EXHAUST SYSTEM OR THE MALOSSI ONE.