I am trying to modify the exhaust manifold and I am looking to buy approx 6 ft of 1.5"OD 16swg steel tube but so far I have yet to locate anyone who stocks this size. I have looked as old exhaust pipes but they are larger diameters so can anyone point me to a stockist in West London Middx Surrey or Herts who wil sell it is that small a quantity.

Thanks

I got my exhaust components from here:
OJZ engineering

Looks like they'll do the 1.5" OD that you need too.