Going in the bin is this exhaust section from an Opel Manta A series which I had been keeping it as a pattern for future reproductions of exhaust systems for the Opel Manta, but that won't be happening now.
The exhaust on the UK version of the Opel Manta differs from the European versions because of the compromises necessary to rework the design to suit a right hand drive vehicle.
The downpipes have to merge much closer to the exhaust manifold than on a European car, in order to clear; the steering column, clutch cable and brake servo. Whether or not this restricts the flow and reduces horsepower is a moot point.
To complicate matters further, automatic variants of the Opel Manta A series require a couple of extra kinks in the downpipe in order to clear the much bulkier gearbox. I have even heard that on the last of the Opel Manta A series, produced from August 1974 onwards, had a different design of engine mount, moving the engine slightly further forward and requiring a marginally longer front pipe.
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| UK version of the Opel Manta A series exhaust |
The downpipes have to merge much closer to the exhaust manifold than on a European car, in order to clear; the steering column, clutch cable and brake servo. Whether or not this restricts the flow and reduces horsepower is a moot point.
To complicate matters further, automatic variants of the Opel Manta A series require a couple of extra kinks in the downpipe in order to clear the much bulkier gearbox. I have even heard that on the last of the Opel Manta A series, produced from August 1974 onwards, had a different design of engine mount, moving the engine slightly further forward and requiring a marginally longer front pipe.
