Detroit Diesel Exhaust Manifold PAI 681140CROSS REFERENCE: PAI 681140 APPLICATION: Detroit Diesel Series 60 Multiple Use Application. DETAILS: Exhaust Manifold Assembly Detroit Diesel Series 60 Application 681140 is a PAI 1PC Designed Exhaust Manifold. It is sold as an assembled kit that includes front rear and center pieces as a single unit. PAI 1PC Design Replaces The Following OE Manifolds Front 23537115 Center 23537114 Rear 23537116. OEM Number Description Quantity N A CENTER EXHAUST