Caterpillar C18 3221126 Cylinder Liner PAI 361616CROSS REFERENCE: 163 8778 1638778 253 8766 2538766 322 1126 3221126 556 0701 5560701 APPLICATION: Caterpillar C18 Multiple Use Application. BRAND: PAI 361616 Caterpillar C18 3221126 Cylinder Liner PAI 361616. USA truck parts and replacement truck parts. Supports piston movement and engine function. All components are proudly manufactured in the U. S. A. by PAI Industries Inc., an ISO9001 certified company with over 50 years of experience in the heavy