These are £393 based on current exchange rates.
http://www.summitracing.com/int/parts/h ... del/camaro
Plus shipping, plus 20%VAT and Import duty.
VAT and import should add about £120, making it about £510. I reckon about £60 for shipping? So looking at approx £570. Better than £800 but still quite a lot for some bent tubing.
Not sure how long regular headers last... mine have been on for about 2 years (without use). i reckon maybe 3-5 years? Say 5 years. Economically speaking you could buy 6x pairs of regular steel headers from somewhere like real steel and that will get you through the next 30 or so years, for the cost of a stainless set. See if somewhere like Real Steel, Top Speed or similar can get you a stainless set. Hopefully they can get a better deal on shipping etc. so you may end up in the £300/ 400 zone.
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