I received two Walker 17864's today. We passed a broken down courier truck on the way home from work and I told my wife wouldn't it be ironic if it was delivering the mufflers. Turns out it was.
Comparing them to the originals, the body is exactly the right length and diameter. The inlets and outlets are the right size and leave lots of room to attach the correct pipes to. The only difference is that the top and bottom pipes are 180 degrees apart whereas the originals have one about 30 degrees rotated (or 'out of timing' as Rob says). I'll see how much play there is (ie if I can distribute the difference between the top and bottom) or if a new custom pipe needs to be made. For sure one side has to be right. My pipes are original WW2 and solid as a rock...I want to reuse them if I can.
One question: the Walkers have an arrow that points A in one direction and B in the other and are not marked 'inlet' and 'outlet'. Is there a convention that says whether A or B is the inlet/outlet?
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