(07 Jun 2015, 8:03 pm)Malarkey wrote No idea but they have a 9 Litre Engine though like the Geminis.
Just pimp them out with plugs and stick them on the 20 then.
Never managed to catch 6099 or 100 eastbound, so unsure as to how they cope on Houghton Cut.
The empty deckers using the A690 after a Rainton Bridge run or an X1, seem to fly up.