1970-1990 Chevrolet 454 Big Block with 168-tooth, externally balanced engines.

Part Number: 20233

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 1965-1990 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.

Features and Benefits

• NHRA and IHRA Legal For All Classes
• Includes SFI Certification Sticker
• Ideal For Street Applications
• Zinc Plated Chromate Finish
• To Extreme Duty Racing
• Proven B&M Quality

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