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Chromer for 4/4 exhaust header

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Rob62:
copper expands and shrinks a lot when heated, maybe its to do with that. if the two metals have significantly different rates of expansion they will eventually break apart I guess..

I remember many moons ago when I used to be a centre lathe turner for a living (1980's). we used to turn large lumps of the stuff (about 12" diameter) and even the low heat generated, when turning with coolant on, was sufficient to cause them to literally fall out of the chuck when they cooled back down, due to severe expansion and shrinkage....

Plus one for Sean at Agbrigg, he certainly is fast and reasonably priced..... not sure if his quality is quite up with the best in the business though... but probably better than the original 1970's factory stuff :-)

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