B&M Steel SFI Certified Flexplate - Small and Big Block Chevrolet - B&M (20230)

B&MMPN20230
Sale Price$201.16
Description : As performance levels increase, an O.E. style flexplate just won't cut it and a stronger option is a necessity to prevent transmission and/or converter failure. B&M has you covered with our high performance SFI approved flexplate designed for 1955-1985 GM small block (internally balanced) V8 engines along with 4.3L V6 engines. Also fits 1965-up GM big block (internally balanced) V8 engines with two piece rear main seal. Features include high tensile strength steel construction to resist elongation and cracking, dual bolt pattern 10.75 or 11.5 inch converter mounting locations, 168 tooth ring gear with double-sided welds for added strength and comes with SFI 29.1 safety certification insuring the ultimate in safety and performance. The assembly is then Zinc plated and treated with a Chromate Conversion Coating for added corrosion resistance and durability. B&M SFI approved flexplates are ideal for extreme duty race applications as well as street cars, tow vehicles or other vehicles needing the added protection and toughness that B&M has been delivering since 1953.
1957-1985 Small Block Chevrolet, 1965-up 396-427 Big Block Chevrolet and 1978-2014 GM 90 degree V6 with 2-pc Rear Main Seal, 168-Tooth, Internal Balanced.
Fits 1955-1985 GM small block V8 and 90 degree V6 engines with 168 tooth ring gear. Also fits 1965-up GM big block V8 engines (internally balanced) 2pc. main seal, using a 168 tooth ring gear. Does not fit 400 cid or 454 cid engines. Has 10.75-inch and 11.5-inch dual bolt patterns.
My Location

Product Details

Description

As performance levels increase, an O.E. style flexplate just won't cut it and a stronger option is a necessity to prevent transmission and/or converter failure. B&M has you covered with our high performance SFI approved flexplate designed for 1955-1985 GM small block (internally balanced) V8 engines along with 4.3L V6 engines. Also fits 1965-up GM big block (internally balanced) V8 engines with two piece rear main seal. Features include high tensile strength steel construction to resist elongation and cracking, dual bolt pattern 10.75 or 11.5 inch converter mounting locations, 168 tooth ring gear with double-sided welds for added strength and comes with SFI 29.1 safety certification insuring the ultimate in safety and performance. The assembly is then Zinc plated and treated with a Chromate Conversion Coating for added corrosion resistance and durability. B&M SFI approved flexplates are ideal for extreme duty race applications as well as street cars, tow vehicles or other vehicles needing the added protection and toughness that B&M has been delivering since 1953.
1957-1985 Small Block Chevrolet, 1965-up 396-427 Big Block Chevrolet and 1978-2014 GM 90 degree V6 with 2-pc Rear Main Seal, 168-Tooth, Internal Balanced.
Fits 1955-1985 GM small block V8 and 90 degree V6 engines with 168 tooth ring gear. Also fits 1965-up GM big block V8 engines (internally balanced) 2pc. main seal, using a 168 tooth ring gear. Does not fit 400 cid or 454 cid engines. Has 10.75-inch and 11.5-inch dual bolt patterns.

Features & Benefits

  • Dual Pattern 10.75-inch and 11.5-inch
  • NHRA and IHRA Legal For All Classes
  • Includes SFI Certification Sticker
  • Ideal For Street Applications
  • Zinc Plated Chromate Finish
  • To Extreme Duty Racing

Part Number (MPN)
20230
Brand
SKU
20230
UPC / GTIN
019695202309 / 00019695202309
Condition
New
# of Teeth
168
Application
Chevrolet
Brand
B&M
California Proposition 65 Chemical Name
Cadmium and cadmium compounds
Category
Transmission
Crankshaft Bolt Hole Count
6
Dual Pattern
No
Emission Code
5
Engine
Chevrolet Small Block Gen I<br />GM Big Block
Grade Type
Performance
IHRA Legal
Yes
Material
Steel
Mounting Hole Quantity
6
NHRA Legal
Yes
Outside Diameter (In)
14.1
part type
Automatic Transmission Flexplate
Product Type
Flexplates
SFI Approved
Yes
SFI Certification
29.1
SFI Certification Sticker
Included
Sub Category
Flexplate
Tooth Quantity
168
Warning
California Proposition 65
Weight (lb)
6.5

YearMakeModelBody & TrimEngine & Transmission
Vehicle #1
Year
Make
Model
Body & Trim
Engine & Transmission

Shipping Policy

Operated by RevolutionParts Inc · Effective date: 11/2025 · Last updated: 4/2026... Check out our Shipping Policy for more details.

Return Policy

At PartsDirect.parts, operated by RevolutionParts Inc, we want you to be completely satisfied with your purchase. This policy outlines how to cancel orders, initiate returns, and receive refunds. Please read it carefully before completing your purchase... Check out our Return Policy for more details.