Detroit Diesel DD15 A4721400209 Front/Rear Exhaust Manifold PAI 681170OEMCROSS REFERENCE: A4721400209 A4721400109 APPLICATION: Detroit Diesel DD15 DETAILS: Genuine Part BRAND: PAI 681170OEM Detroit Diesel A4721400209 Front Rear Exhaust Manifold PAI 681170OEM featuring diesel performance parts and USA truck parts. Ensures strong manifold sealing and dependable 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