Engine piston kit Car Engine Piston Pin Rings Kit Assembly EJ7Z-6108-E EJ7Z6108B For Ford Focus Mustang Lin-coln MKC 2015-2019 EJ7Z-6140-A

Part Number:EJ7Z-6108-A, EJ7Z6108A, EJ7Z 6108 AEJ7Z-6108-B, EJ7Z6108B, EJ7Z 6108 BEJ7Z-6108-C, EJ7Z6108C, EJ7Z 6108 CEJ7Z-6108-E, EJ7Z6108E, EJ7Z 6108 EEJ7Z-6135-A, EJ7Z6135A, EJ7Z 6135-AEJ7Z-6140-A, EJ7Z6140A, EJ7Z 6140-AEJ7Z-6148-A, EJ7Z6148A, EJ7Z 6148-AFitment:FOR Ford Focus 2016-2018FOR Ford Mustang 2015-2018FOR Lincoln MKC 2015-2019Colour:SilverMaterial:Metal

• 1；Top shape: flat top (compact combustion chamber), concave top (adjustable compression ratio), convex top (two-stroke specific), which needs to be matched with the cylinder head flow channel to achieve efficient combustion.
• 2；Asymmetric design (offset 1-2mm) reduces knocking noise, and pin hole retaining rings prevent axial movement
• 3；Aluminum silicon alloy (lightweight+thermal conductivity) or cast iron (wear resistance), some high-performance pistons use forging technology to enhance grain structure.
• 4；Skirt design: Adopting a variable elliptical barrel structure to compensate for thermal deformation, the cold state is pre processed into an elliptical shape perpendicular to the piston pin, ensuring uniform running clearance.
• 5；The instantaneous temperature at the top can reach 2500K, and the working area is 600-700K, requiring special heat-resistant coatings or alloy materials.