The answer is - "it depends". Series 2a exhaust except possibly early ones (not sure when it changed) is either identical or at least completely interchangeable with Series 3.
Series 2 exhaust manifold and front pipe are not the same, with the exhaust pipe flange on the manifold pointing up, and I suspect these continued into early 2a.
And, of course, the earliest Series 2 swb had the 2 litre engien with a different exhaust anyway.
Note that the front pipe is different if a LH fuel tank is fitted.
John
John
JDNSW
1986 110 County 3.9 diesel
1970 2a 109 2.25 petrol
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