Beware of Some Companies Selling RCD look a like Stuff ------ ours is Genuine RCD
Minimum Size lower Pulley is 55 Tooth 8mm
Small Block Chevy Crankshaft support - For High Boost engines , or overdrives 20% or More*
AVAILABLE FOR BB CHEVY SNOUT - CHOOSE OPTION
IF YOU WANT TO USE AN ACCESSORY PULLEY ON THE BLOWER HUB INSIDE THE SUPPORT CHOOSE THE "EXTENDED" OPTION
The Blower will try to pull the Crankshaft up into the upper main bearing without a support , often breaking off the snout of a small block crankshaft - This helps that issue by putting the crankshaft in a more neutral support fashion. Sort of like having a 6th main bearing.
With RCD Hub, and Special Hub Bolt
NEW RCD ALUMINIUM CRANK SUPPORT SYSTEM:
You can add any 6-3/8" RCD Trigger wheel or Degree Wheel to this hub.
Not room for a 1V accessory pulley - See our Extended SB Support for using a 1V accessory drive
Bearing rated to over 9000 RPM