@the bodj
Inner sleeve is .75 x 0.120wall 4130
White is 6-6 Nylon 1.0x0.120” wall tube from mcmaster
Black is soft urethane 2”ODx.5” wall tube from McMaster. I custom ground a tool to cut it—which is really difficult to hold tolerances because it’s soft and moves all over the place. I suggest grinding whilst spinning the soft urethane in the lathe. Cuts down on the bypass noise by around 70%. Dodah bought some bushings for this propose, IIRC. Shoot him a text, or I’ll ask that bastard if I see him at work.
These are for 3.0’s:
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