Also i tried to make it 58" from the ex' valve to the end like L/ning pipes, Always looking for more power !!, But it does seem to make more noise. Cheers Bill.
Hi Bill,
How is that measurement taken? Outside curve?, centerline of pipe?, and you seem to say you measure to the inside of the exhaust port at the valve seat for the 58"? Rough measurement of my std twin exhaust shows the rear longer than the front by 3 1/2 " measuring from the outside of the tight exhaust nut on the outside curve. The length for the front pipe is a little over 61 and the rear is likely 64.5 or so. If you add inside the port it must be a couple of inches more. Hard to measure. (Probably last century news to most of you, but I never thought about it. I was just pleased if they fit well.) BTW the new pipes I am fitting, of unknown origin but from the 1980's, are 15 Ga., .o67 plus 2 thou chrome for .069. They go right on without a struggle and were bought by my brother, who owned the project at the time, at the same time as the Toga, probably from Coventry Spares. Metal thickness must have a lot to do with sound dampening. I am sure that is well researched also and far more complex than I care to know much about.
Ron