Product Spotlight - SST's GM 621 Reproduction Bellhousing

Having a hard time locating a good Chevy 621 bellhousing that doesn't have stripped threads or cracks? Look no further because Silver Sport Transmissions produces its own version of the 621 bellhousing. Here are some of the features:

  • Strong thick wall titanium-aluminum alloy – 50% thicker than OE
  • Precision CNC machining including spot faced mounting holes, precision dowel pin holes and bores
  • Works with stock clutch linkage and hydraulic clutch actuator
  • Uses the 168-tooth flywheel and standard GM starter
  • Maintains Transmission Life - high accuracy (< 0.003 inch runout) maintains transmission life, shift quality, low noise
  • Brand New - all threads, bores, faces are in new condition and clean
  • Accurate Starter Location - precision CNC machining
  • Uses all factory linkage parts: clutch forks, z-bar, rubber dust boot, etc.
  • Includes Inspection Cover (except for LS) and Hardware
  • 11.5 lbs
  • Choose GM, GM LS, or GM LT engine platform

SST, your industry leader in producing quality kits, can supply you with everything you need to install an LS or LT engine and hydraulic clutch.

  • Bellhousing
  • Needle roller pilot bearing
  • Flywheel and bolts
  • Clutch kit and bolts
  • Complete hydraulic actuator kit

Both bellhousing styles are compatible with the following transmissions:

  • Tremec TKO
  • Tremec TKX
  • Muncie 4 speed
  • Borg-Warner Super T10
  • Saginaw 3 and 4 speed
  • Any manual transmission sharing this same bolt pattern and input shaft length requiring a 4.685” register hole.


Put the endless search behind you and call today to order! 865-609-8187

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