Mack/Volvo 21141725 Idler Pulley PAI 801115CROSS REFERENCE: 21141725 22923707 20822521 APPLICATION: Mack MP7 MP8 Volvo D11 D13 Multiple Use Application. BRAND: PAI 801115 Mack Volvo 21141725 Idler Pulley PAI 801115 intended for truck parts and heavy duty truck parts. Ensures stable belt guidance and long lasting durability. 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 truck parts