TRD, Daizen, Kaaz, OS Giken, Cusco, Hypercoil, Bilstein, Marlin Crawler, Driftmotion, Figs Engineering, Koyo, Southbend... and the Supra MKIV OEM parts bin.
With this car there are all those names and more catering to specific niches of parts on the SC chassis. With many of them you need to substitute the Supra MKIV for your SC as it has tremendous aftermarket support and a lot of its parts (but not ALL of its parts) are a bolt-in affair. It gets very specific. Better OEM Supra MKIV engine mounts can be used, for example, but you will want 1997-98 specification unless you order new brackets from Toyota as well.
Depends on what component you wish to upgrade to. But if you are looking for a one-stop tuning firm that offers parts... that doesn't really exist. But top-tier tuning firms that can transform an SC (or Supra) do exist.
It's just that many of us do it ourselves and refer to forum DIYs for the most proven upgrade paths and parts.
1993 SC300 5-speed NA | Built R154 | Gixxer_Drew Susp. 600/325 | TT: brakes FR, rims, rear sway, seats | Koyo rad | 4.272 TT Torsen LSD | 2JZGTE in progress
Last edited by KahnBB6; 03-25-15 at 12:52 PM..