Re: Torque Thrust Help
I think it was about 1965 when American began casting TTs in aluminum. Once they did everyone else copied the TT since the process was probably much cheaper than working with magnesium. TTOs are close to original and if you cut-in the small 'step' between the cast and polished part they look great. I have a pair of skinny 15" TTOs, 5" I think, that were so modified and the center area around the hub narrowed to fit the older, smaller screw pattern center caps. They look cool.
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