Caterpillar C15/C18 3327297 Camshaft PAI 391916CROSS REFERENCE: 3327297 332 7297 2430551 243 0551 2396139 239 6139 10R7157 APPLICATION: Caterpillar C15 C18 Multiple Use Application. BRAND: PAI 391916 Caterpillar C15 C18 3327297 Camshaft PAI 391916. Heavy duty truck parts and diesel truck parts. Maintains valve control and stable timing. 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 duty