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Ships within 48 hours · Estimated delivery Jul 12 - Jul 17
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For Your Every Summer RSVP, with Code: SUMMER15
Description
B&M Steel SFI Certified Flexplate - Small Block Chevrolet - 20232Overview: 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 1955 1985 400ci small block chevy V8 engines (externally balanced) with two piece rear main seal. Features include high tensile strength steel construction to resist elongation and cracking, dual bolt pattern 10.
Overview:
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 1955-1985 400ci small block chevy V8 engines (externally balanced) 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:
- NHRA and IHRA Legal For All Classes
- Dual Pattern 10.75 and 11.5-Inch
- Includes SFI Certification Sticker
- Ideal For Street Applications
- Zinc Plated Chromate Finish
- To Extreme Duty Racing
- Proven B&M Quality
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| 1978 | Pontiac | Grand Safari | ||
| 1970 - 1972 | Chevrolet | Brookwood | 400/6.6 V8 | |
| 1970 - 1974 | Chevrolet | Caprice | 400/6.6 V8 | |
| 1970 - 1972 | Chevrolet | Chevelle | Base | 400/6.6 V8 |
| 1971 - 1972 | Chevrolet | Chevelle | SS | 400/6.6 V8 |
| 1976 | Chevrolet | G20 | Chevy Van | 400/6.6 V8 |
| 1976 | Chevrolet | G20 | Sportvan | 400/6.6 V8 |
| 1975 - 1980 | Chevrolet | G20 | 400/6.6 V8 | |
| 1970 - 1972 | Chevrolet | Townsman | 400/6.6 V8 | |
| 1971 - 1976 | GMC | Sprint | 400/6.6 V8 | |
| 1965 - 1969 | Oldsmobile | 442 | 400/6.6 V8 | |
| 1967 | Oldsmobile | Cutlass | Turnpike Cruiser | 400/6.6 V8 |
| 1968 | Oldsmobile | Cutlass | Base | 400/6.6 V8 |
| 1965 - 1966 | Oldsmobile | F85 | Base | 400/6.6 V8 |
| 1968 - 1969 | Oldsmobile | Vista Cruiser | 400/6.6 V8 | |
| 1968 - 1978 | Pontiac | Bonneville | 400/6.6 V8 | |
| 1968 - 1978 | Pontiac | Catalina | 400/6.6 V8 | |
| 1968 - 1977 | Pontiac | Firebird | Base | 400/6.6 V8 |
| 1968 - 1969 | Pontiac | Firebird | 400 | 400/6.6 V8 |
| 1969 - 1979 | Pontiac | Firebird | Trans Am | 400/6.6 V8 |
| 1970 - 1974 | Pontiac | Firebird | 400/6.6 V8 | |
| 1973 - 1975 | Pontiac | Grand Am | 400/6.6 V8 | |
| 1968 - 1975 | Pontiac | Grand Prix | 400/6.6 V8 | |
| 1972 | Chevrolet | Chevelle | Concours | 400/6.6 V8 |
| 1972 | Chevrolet | Chevelle | Malibu | 400/6.6 V8 |
| 1972 | Chevrolet | Chevelle | Nomad | 400/6.6 V8 |
| 1970 - 1975 | Chevrolet | El Camino | Base | 400/6.6 V8 |
| 1970 | Chevrolet | El Camino | Custom | 400/6.6 V8 |
| 1970 - 1975 | Chevrolet | El Camino | SS | 400/6.6 V8 |
| 1971 - 1976 | Chevrolet | El Camino | 400/6.6 V8 | |
| 1970 - 1976 | Chevrolet | Impala | 400/6.6 V8 | |
| 1970 - 1971 | Chevrolet | Kingswood | Base | 400/6.6 V8 |
| 1972 | Chevrolet | Kingswood | 400/6.6 V8 | |
| 1973 - 1975 | Chevrolet | Malibu | Base | 400/6.6 V8 |
| 1970 - 1976 | Chevrolet | Monte Carlo | 400/6.6 V8 | |
| 1973 | Chevrolet | Monte Carlo | Base | 400/6.6 V8 |
| 1979 - 1980 | GMC | K2500 | 400/6.6 V8 | |
| 1975 - 1978 | GMC | K25 Suburban | 400/6.6 V8 | |
| 1979 - 1980 | GMC | K2500 Suburban | 400/6.6 V8 | |
| 1977 - 1978 | GMC | K35 | 400/6.6 V8 | |
| 1979 - 1980 | GMC | K3500 | 400/6.6 V8 | |
| 1975 | Oldsmobile | 98 | 400/6.6 V8 | |
| 1975 | Oldsmobile | Custom Cruiser | 400/6.6 V8 | |
| 1975 | Oldsmobile | Delta 88 | 400/6.6 V8 | |
| 1976 | Pontiac | Catalina | Base | 400/6.6 V8 |
| 1976 | Pontiac | Catalina | Safari | 400/6.6 V8 |
| 1976 | Pontiac | Firebird | Esprit | 400/6.6 V8 |
| 1976 - 1979 | Pontiac | Firebird | Formula | 400/6.6 V8 |
| 1975 - 1977 | Pontiac | Grand LeMans | Safari | 400/6.6 V8 |
| 1976 - 1977 | Pontiac | Grand LeMans | Base | 400/6.6 V8 |
| 1976 - 1977 | Pontiac | Grand Prix | Base | 400/6.6 V8 |
| 1976 - 1977 | Pontiac | Grand Prix | SJ | 400/6.6 V8 |
| 1979 - 1980 | GMC | G3500 | 400/6.6 V8 | |
| 1975 - 1979 | GMC | Jimmy | 400/6.6 V8 | |
| 1975 - 1978 | GMC | K15 | 400/6.6 V8 | |
| 1979 - 1980 | GMC | K1500 | 400/6.6 V8 | |
| 1975 - 1978 | GMC | K15 Suburban | 400/6.6 V8 | |
| 1979 - 1980 | GMC | K1500 Suburban | 400/6.6 V8 | |
| 1975 - 1978 | GMC | K25 | 400/6.6 V8 | |
| 1978 | GMC | C15 | High Sierra | 400/6.6 V8 |
| 1978 | GMC | C15 | Sierra Classic | 400/6.6 V8 |
| 1978 | GMC | C15 | Sierra Grande | 400/6.6 V8 |
| 1978 | GMC | C15 | Street Coupe | 400/6.6 V8 |
| 1979 | GMC | C1500 | Base | 400/6.6 V8 |
| 1979 | GMC | C1500 | High Sierra | 400/6.6 V8 |
| 1979 | GMC | C1500 | Sierra Classic | 400/6.6 V8 |
| 1979 | GMC | C1500 | Sierra Grande | 400/6.6 V8 |
| 1979 | GMC | C1500 | Street Coupe | 400/6.6 V8 |
| 1980 | GMC | C1500 | 400/6.6 V8 | |
| 1976 - 1978 | GMC | C25 | 400/6.6 V8 | |
| 1979 | GMC | C2500 | 400/6.6 V8 | |
| 1978 | GMC | C25 Suburban | 400/6.6 V8 | |
| 1980 | GMC | C2500 Suburban | 400/6.6 V8 | |
| 1976 - 1978 | GMC | C35 | 400/6.6 V8 | |
| 1979 | GMC | C3500 | 400/6.6 V8 | |
| 1976 | GMC | G15 | Vandura | 400/6.6 V8 |
| 1979 | GMC | G1500 | Rally | 400/6.6 V8 |
| 1979 | GMC | G1500 | Rally STX | 400/6.6 V8 |
| 1975 - 1978 | GMC | G25 | 400/6.6 V8 | |
| 1979 - 1980 | GMC | G2500 | 400/6.6 V8 | |
| 1975 | GMC | G35 | Rally | 400/6.6 V8 |
| 1975 | GMC | G35 | Rally STX | 400/6.6 V8 |
| 1975 | GMC | G35 | Vandura | 400/6.6 V8 |
| 1975 | GMC | G35 | Rally Camper Special | 400/6.6 V8 |
| 1975 | GMC | G35 | Vandura Special | 400/6.6 V8 |
| 1976 - 1978 | GMC | G35 | 400/6.6 V8 | |
| 1975 - 1976 | Chevrolet | G30 | Sportvan | 400/6.6 V8 |
| 1975 - 1976 | Chevrolet | G30 | Hi-Cube | 400/6.6 V8 |
| 1977 - 1980 | Chevrolet | G30 | 400/6.6 V8 | |
| 1975 - 1980 | Chevrolet | K10 | 400/6.6 V8 | |
| 1975 - 1979 | Chevrolet | K10 Suburban | 400/6.6 V8 | |
| 1975 - 1980 | Chevrolet | K20 | 400/6.6 V8 | |
| 1975 - 1980 | Chevrolet | K20 Suburban | 400/6.6 V8 | |
| 1977 - 1980 | Chevrolet | K30 | 400/6.6 V8 | |
| 1975 - 1976 | Chevrolet | Laguna | 400/6.6 V8 | |
| 1975 | Chevrolet | Malibu | Classic | 400/6.6 V8 |
| 1975 | Chevrolet | Malibu | Classic Estate | 400/6.6 V8 |
| 1976 | Chevrolet | Malibu | 400/6.6 V8 | |
| 1977 | Chevrolet | P10 | 400/6.6 V8 | |
| 1976 | Chevrolet | P30 | 400/6.6 V8 | |
| 1976 | GMC | C15 | 400/6.6 V8 | |
| 1978 | GMC | C15 | Base | 400/6.6 V8 |
| 1972 - 1975 | Pontiac | Grandville | 400/6.6 V8 | |
| 1968 - 1973 | Pontiac | GTO | 400/6.6 V8 | |
| 1971 | Pontiac | GTO | Base | 400/6.6 V8 |
| 1968 - 1970 | Pontiac | LeMans | 400/6.6 V8 | |
| 1971 - 1977 | Pontiac | LeMans | Base | 400/6.6 V8 |
| 1971 - 1977 | Pontiac | LeMans | Sport | 400/6.6 V8 |
| 1975 | Buick | LeSabre | Custom | 400/6.6 V8 |
| 1970 - 1975 | Chevrolet | Bel Air | 400/6.6 V8 | |
| 1975 - 1979 | Chevrolet | K5 Blazer | 400/6.6 V8 | |
| 1976 - 1980 | Chevrolet | C10 | 400/6.6 V8 | |
| 1978 - 1979 | Chevrolet | C10 | Cheyenne | 400/6.6 V8 |
| 1978 - 1979 | Chevrolet | C10 | Custom Deluxe | 400/6.6 V8 |
| 1978 - 1979 | Chevrolet | C10 | Scottsdale | 400/6.6 V8 |
| 1978 - 1979 | Chevrolet | C10 | Silverado | 400/6.6 V8 |
| 1976 - 1980 | Chevrolet | C20 | 400/6.6 V8 | |
| 1976 - 1980 | Chevrolet | C20 Suburban | 400/6.6 V8 | |
| 1976 - 1978 | Chevrolet | C30 | 400/6.6 V8 | |
| 1975 - 1976 | Chevrolet | Caprice | Classic | 400/6.6 V8 |
| 1975 | Chevrolet | Caprice | Estate Wagon | 400/6.6 V8 |
| 1975 - 1976 | Chevrolet | Caprice | Classic Sport | 400/6.6 V8 |
| 1976 | Chevrolet | Caprice | Classic Estate | 400/6.6 V8 |
| 1976 | Chevrolet | Caprice | Classic Landau | 400/6.6 V8 |
| 1975 | Chevrolet | El Camino | Classic | 400/6.6 V8 |
| 1976 | Chevrolet | G10 | 400/6.6 V8 | |
| 1976 | Chevrolet | G20 | Beauville | 400/6.6 V8 |
| 1970 - 1972 | Chevrolet | Biscayne | 400/6.6 V8 | |
| 1973 - 1977 | Pontiac | LeMans | Safari | 400/6.6 V8 |
| 1967 | Buick | Gran Sport | 400/6.6 V8 | |
| 1967 | Buick | Skylark | 400/6.6 V8 | |
| 1975 - 1976 | Chevrolet | G30 | Beauville | 400/6.6 V8 |
| 1975 - 1976 | Chevrolet | G30 | Chevy Van | 400/6.6 V8 |
| 1977 | Pontiac | Grand Prix | LJ | 400/6.6 V8 |
| 1975 - 1977 | Pontiac | Grand Safari | 400/6.6 V8 | |
| 1968 | Buick | Sportwagon | 400/6.6 V8 | |
| 1968 - 1970 | Pontiac | Executive | 400/6.6 V8 | |
| 1968 - 1969 | Pontiac | Tempest | 400/6.6 V8 | |
| 1969 | Buick | Sportwagon | Base | 400/6.6 V8 |
| 1970 | Pontiac | Tempest | Base | 400/6.6 V8 |
| 1966 | Buick | Gran Sport | 401/6.6 V8 | |
| 1966 | Buick | Skylark | 401/6.6 V8 | |
| 1970 - 1971 | Chevrolet | Brookwood | 402/6.6 V8 | |
| 1972 | Chevrolet | Chevelle | Base | 402/6.6 V8 |
| 1972 | Chevrolet | Chevelle | Concours | 402/6.6 V8 |
| 1972 | Chevrolet | Chevelle | SS | 402/6.6 V8 |
| 1972 | Chevrolet | Chevelle | Malibu | 402/6.6 V8 |
| 1972 | Chevrolet | Chevelle | Nomad | 402/6.6 V8 |
| 1972 | Chevrolet | Chevelle | Concours Estate | 402/6.6 V8 |
| 1972 | Chevrolet | Chevelle | Greenbrier | 402/6.6 V8 |
| 1977 - 1978 | Pontiac | Bonneville | 403/6.6 V8 | |
| 1977 - 1978 | Pontiac | Catalina | 403/6.6 V8 | |
| 1977 | Pontiac | Firebird | Base | 403/6.6 V8 |
| 1977 - 1979 | Pontiac | Firebird | Formula | 403/6.6 V8 |
| 1977 - 1979 | Pontiac | Firebird | Trans Am | 403/6.6 V8 |
| 1977 | Pontiac | Grand LeMans | Base | 403/6.6 V8 |
| 1977 | Pontiac | Grand LeMans | Safari | 403/6.6 V8 |
| 1977 | Pontiac | LeMans | Base | 403/6.6 V8 |
| 1977 | Pontiac | LeMans | Sport | 403/6.6 V8 |
| 1977 | Pontiac | LeMans | Safari | 403/6.6 V8 |
| 1977 | Pontiac | Grand Prix | Base | 403/6.6 V8 |
| 1977 | Pontiac | Grand Prix | SJ | 403/6.6 V8 |
| 1977 | Pontiac | Grand Prix | LJ | 403/6.6 V8 |
| 1977 | Pontiac | Grand Safari | 403/6.6 V8 |
Specs:
| # of Teeth | 168 |
|---|---|
| Balance | External |
| Brand | B&M |
| California Proposition 65 Chemical Name | Cadmium and cadmium compounds |
| California Proposition 65 Required | Yes |
| Crankshift Bolt Hole Count | 6 |
| Dual Pattern | No |
| Emission Code | 5 |
| IHRA Legal | Yes |
| NHRA Legal | Yes |
| Outside Diameter (in) | 14.1 |
| Product Type | Automatic Transmission Flexplate |
| SFI Approved | Yes |
| SFI Certification | 29.1 |
| SFI Certification Sticker | Included |
| Warning | California Proposition 65 |
| Weight (lb) | 6.25 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 1171 reviews
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Product Reviews
★★★★★ 5
These ACTUALLY stay put all day long - I was skeptical, but am so glad I took a chance on these
Size: Medium, Color: (014) Halo Gray / Halo Gray / Castlerock
I was so skeptical about whether these would stay on my feet all day without sliding down into my shoe - I’ve tried so many socks in the past with the silicone strip on the heel which failed.
I’ve owned these for a couple months now and they have never slipped down - they stay put all day! I love the variety of colors to choose from, and the value per pack is great since six pairs come per pack (I thought it was only three when I first purchased and was pleasantly surprised by the additional pairs). They also have perfect thickness - not too warm to wear during the summer months with sneakers; I live in a tropical climate, though, so I’m not sure how they will do in cooler climates. I’ve washed each pair once or twice and the color and quality of the silicone has stayed so far (knock on wood).
Overall: high recommend based on my experience so far!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 13, 2025
★★★★★ 5
Great fit!
Size: Medium, Color: (403) Washed Navy / Washed Navy / Blue Smoke
Great quality!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 15, 2026
★★★★★ 5
My favorite socks
Size: Medium, Color: (659) Fuchsia Dusk / Fuchsia Dusk / Tourmaline Pink
Very comfortable. True to size. Moisture wicking
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 25, 2026
★★★★★ 4
No show but stays on
Size: Medium, Color: (014) Halo Gray / Halo Gray / Castlerock
I wear these socks daily. They truly don’t show with my workout shoes or with hey dudes. But the best thing about them is that they actually stay on your foot. I work out hard and I don’t ever have to pull them up. I do wish they were just a little bit thicker than they are, but they are definitely a product I will buy again.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2026
★★★★★ 5
I like the ankle length, they don’t slip.
Size: Medium, Color: (025) Castlerock / Castlerock / Anthracite
I love these socks, they are thick enough to not be scratchy, thin enough to be cool and breathable.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on March 28, 2026
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