NRC9137 - Exhaust Downpipe – 2.5L NA DieselExhaust Downpipe for the Land Rover Defender fitted with the 4 cylinder 2. 5 litre naturally aspirated diesel engine. This primary exhaust pipe connects the exhaust manifold outlet to the intermediate pipe and silencer assembly, forming the first section of the complete exhaust system. Supplied as a direct replacement for Defender 90 and 110 models produced up to VIN BA267063.