B&M 20233 Automatic Transmission Flexplate

Part Number
Automatic Transmission Flexplate; Standard SFI; External Balance; 168 Tooth; Dual; 10.75 in. and 11.5 in. Bolt Circle

Fits: Chevrolet Bel Air, Chevrolet Biscayne, Chevrolet Blazer, Chevrolet Brookwood, Chevrolet C10, Chevrolet C10 Suburban, Chevrolet C1500, Chevrolet C20, Chevrolet C20 Suburban, Chevrolet C30, Chevrolet C3500, Chevrolet Caprice, Chevrolet Chevelle, Chevrolet Corvette, Chevrolet El Camino, Chevrolet G20, Chevrolet G20 Van, Chevrolet G30, Chevrolet Impala, Chevrolet K10, Chevrolet K10 Suburban, Chevrolet K20, Chevrolet K20 Suburban, Chevrolet K30, Chevrolet K3500, Chevrolet K5 Blazer, Chevrolet Kingswood, Chevrolet Laguna, Chevrolet Malibu, Chevrolet Monte Carlo, Chevrolet Nova, Chevrolet P20, Chevrolet P30, Chevrolet R20, Chevrolet R20 Suburban, Chevrolet R2500, Chevrolet R2500 Suburban, Chevrolet R30, Chevrolet R3500, Chevrolet Townsman, Chevrolet V20 Suburban, Chevrolet V2500 Suburban, Chevrolet V30, Chevrolet V3500

In stock
Free Shipping
Free Shipping
Estimated Ship Date: 1 Business Day or Less
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 flexplate designed for 1965-90 Chevrolet big block 454ci (externally 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. Compatible with Powerglide, TH350, TH400 and TH700R4 automatic transmissions



  • Fits 1990 and earlier GM 454 cid big block externally balanced V8 engine uses a 168 tooth ring gear and has 10.75 inch and 11.5 inch bolt patterns. Compatible with Powerglide; TH350; TH400 and TH700R4 automatic transmissions
  • Auto Trans Flexplate
  • Automatic Transmission Flexplate
  • Ideal For Street Applications
  • To Extreme Duty Racing
  • Holley Performance Emission Code 5: This part is legal for sale or use on Emissions Controlled Vehicles; Uncontrolled (Non-Emissions Controlled) Vehicles; and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations
  • 20233; Flexplate; B/M; transmission; automatic; shift kit; improver; transkit; racing; knob; lever; torque converter
  • NHRA/IHRA Legal For All Classes
  • Automatic Transmission Flexplate; Standard SFI; External Balance; 168 Tooth; Dual; 10.75 in. and 11.5 in. Bolt Circle;
  • Includes SFI Certification Sticker
  • To High RPM Use


California Proposition 65 Chemical Name 1Cadmium and cadmium compounds
Crankshaft Bolt Hole Quantity6
Dual PatternYes
IHRA LegalYes
Item Weight7.500 lbs.
NHRA AcceptedYes
Outside Diameter14.100 in.
SFI ApprovedYes
SFI Certification StickerIncluded
Timing Marks168
TitleB&M 20233 Flexplate For 168 Tooth 454 CID Engine
WARNING CA Proposition 65Yes
WARNING CA Proposition 65 MessageWARNING: Cancer and Reproductive Harm - www.P65Warning.ca.gov

Standard SFI; External Balance; 168 Tooth; Dual; 10.75 in. and 11.5 in. Bolt Circle




  • 1970-1975 Chevrolet Bel Air
  • 1970-1974 Chevrolet Corvette
  • 1989-1989 Chevrolet R2500
  • 1975-1990 Chevrolet P30
  • 1971-1972 GMC Sprint
  • 1988-1990 Chevrolet G30
  • 1973-1975 Chevrolet Malibu
  • 1975-1986 Chevrolet C20
  • 1976-1978 Chevrolet K20
  • 1970-1975 Chevrolet El Camino
  • 1970-1976 Chevrolet Impala
  • 1990-1990 Chevrolet C1500
  • 1970-1972 Chevrolet Caprice
  • 1988-1990 Chevrolet K3500
  • 1970-1972 Chevrolet Chevelle
  • 1976-1976 Chevrolet G20
  • 1970-1972 Chevrolet Biscayne
  • 1976-1976 Chevrolet P20
  • 1989-1990 Chevrolet R3500
  • 1973-1974 Chevrolet Blazer
  • 1975-1975 Chevrolet Laguna
  • 1976-1978 Chevrolet K5 Blazer
  • 1987-1988 Chevrolet R20 Suburban
  • 1977-1977 Chevrolet K30
  • 1970-1972 Chevrolet Kingswood
  • 1970-1972 Chevrolet Townsman
  • 1970-1975 Chevrolet Monte Carlo
  • 1980-1980 Chevrolet K10
  • 1973-1986 Chevrolet C20 Suburban
  • 1975-1980 Chevrolet C10
  • 1975-1976 Chevrolet Caprice
  • 1988-1990 Chevrolet C3500
  • 1970-1971 Chevrolet Nova
  • 1976-1976 Chevrolet K10
  • 1985-1985 Chevrolet K20 Suburban
  • 1975-1976 Chevrolet G30
  • 1987-1988 Chevrolet R30
  • 1979-1979 Chevrolet P20
  • 1970-1972 Chevrolet Brookwood
  • 1990-1990 Chevrolet V2500 Suburban
  • 1973-1974 Chevrolet K20 Suburban
  • 1987-1988 Chevrolet V30
  • 1973-1974 Chevrolet K10 Suburban
  • 1989-1990 Chevrolet V3500
  • 1975-1986 Chevrolet C30
  • 1973-1980 Chevrolet C10 Suburban
  • 1973-1974 Chevrolet G20 Van
  • 1980-1986 Chevrolet K30
  • 1987-1988 Chevrolet V20 Suburban
  • 1987-1988 Chevrolet R20
  • 1989-1990 Chevrolet R2500 Suburban
Customer Questions
No Questions
Please, mind that only logged in users can submit questions

Compatible Vehicles

Copyright © 2013-present PartsHawk, LLC. All rights reserved.