Exhaust crossover pipe

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EstuaryBoy said:
At the risk of repeating myself (myself!), I wonder if the cracking is due to some perhaps neglecting to slacken then tighten the crossover fittings EVERY time the exhaust roses are checked?
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Nope. Poor design. The very next year included spherical washers to "allow some movement".
My '74 pipes cracked.

Engineering compromises leading to exhaust threads stripped (2012)

Best I can see is, the exhaust threads being a problem area, is the result of multiple engineering EVOLUTION compromises. In the beginning, the head was cast iron and the threaded attachments probably worked just fine. Then the thread (head) material changed to softer aluminum... and they...
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Exhaust crossover pipe
 
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Shouldn't tempt fate I know, but I have a Mk3 using the earlier type of crossover pipes (from Armours 11 years ago) and all good so far....
Will be first to admit I don't hang on to high revs, though.
 
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