Cheers anyway for the advise Russ, the headers are in now. I will leave them un treated until the end of the year when I get more work done and they come out again.

I will probably do the ceramic plus the wrap. I already have the wrap, but as I said, I was advised against it by people who have had their headers crack. Not sure how they proved it was from the wrap and not poor quality material (stainless steel or whatever) or the welding. But anyway....

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Cheers,

Simon.