BP Series SFI Approved Flexplate, Black, 2.75" center- Internally (Nuetral) Balanced

Transmission Bolt Patterns Included: TH400, TH350, 700R4
 
Benefits/Characteristics

• SFI 29.1 certified
• Direct bolt on component
• Rated to 12,500 RPM
• 40% thicker than stock Flexplates
• Precision Balanced
• Features double welded ring gears for added durability.

To use with cranks with 2.5" hub you can use the Butler spacer ring BPI-1025 and cranks with 2-9/16 hub you can use the BPI-1024 adapter

Internal (Neutral) Balance vs External (Stock) Balance

Pontiac balanced the cranks from the factory using a method called external or stock balance. This called for an offset weighted flexplate or flywheel. Some had holes drilled to lighten one side or an additional weight bolted to it in order to add weight to a side. Butler and most shop now internally or neutrally balance crankshafts. This means you can use a flexplate or flywheel that is neutrally balanced with no offset holes or added weights.