) but without manifolds (Thanks alot Racer 38 
) for my 21 but I have a plan 
I'm going to cut the ends off the stock pipes and sleeve them over the ends of the JHA's and weld then on so I can use the stock clamps.
See I'm a genius
So my question is when the JHA pipes are on their manifolds do the ends of the pipes butt up tight to the flange of the manifolds ???
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Harley Davidson is the worlds most efficient way to turn petrol into noise without the harmful side effect of horsepower.