tt.net is slang for
www.twinturbo.net - by far the greatest web resource for the Z32, possibly one of the greatest websites ever. The classified section that I linked to has a fresh inventory every day.
twinturbo.com is nothing, it's been "under construction" for years.
Z1 is
www.z1motorsports.com probably the biggest 300ZX specialty shop in America. They usually have a dozen wrecked cars they're parting out plus a huge stock pile of parts from previous wrecks on hand.
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1989 240SX Fastback. . . . . . . . . . . . . . . . . . . . . . . . . . . 1995 300ZX Twin Turbo
Warning: Objects in mirror aren't as fast as they thought they were.