There is another better version available now. Pm me for details and prices.
Would the above be better than the elusive bsh TB pipe? Do you know when you'll have time to fabricate a tb pipe and will it have a WMI bung?
I think its very worthwhile replacing the plastic pipe with a slightly larger bore alloy version, but not running the wmi before the tb.
Best option would be to have an uprated pipe and the wmi in a spacer between the tb and the inlet. No worries of the wmi destroying the plastic tb.
I still don't think wmi is the best overall option after seeing the state of some intake guides after meth was run for a period of time. This was a 50/50 mix and I would only run a 75 water and 25 meth mix.
Remember the water does the cooling and the meth adds extra fueing and higher octane. Meth also kills aluminium.