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Description
Hays 15-075 Steel SFI Approved Flexplate, 1967-79 Buick, 403-455Overview: Hays heavy duty flexplates for high performance and competition engines are constructed of a thicker than stock steel plate, enabling them to withstand the stress of high stall torque converters and today's high RPM engines. While factory stock plates tend to crack around the crankshaft hub when punished under high torque and RPM conditions, the thicker Hays Flexplate handles the force. These H. D. flexplates are supplied with a ring gear
Overview:
Hays heavy-duty flexplates for high performance and competition engines are constructed of a thicker than stock steel plate, enabling them to withstand the stress of high-stall torque converters and today's high-RPM engines. While factory stock plates tend to crack around the crankshaft hub when punished under high torque and RPM conditions, the thicker Hays Flexplate handles the force. These H.D. flexplates are supplied with a ring gear that is securely welded in place and feature dual bolt patterns for flexibility in adapting to multiple transmission style torque converters. All Hays heavy-duty flexplates are zinc-dichromate plated to resist corrosion and are SFI certified under specification 29.1.
Features:
- All applications for flexplates are SFI 29.1 Certified
- Fits TH350 and TH400
- Flexplate features Zinc Dichromate Plated finish for superior corrosion resistance and good looks
- Heavy Duty design utilized thicker than stock steel plate enabling to withstand the stress of high-stall converters and high-RPM engines
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| 1968 - 1969 | Buick | Electra | 225 Custom | 430/7.0L V8 |
| 1968 - 1969 | Buick | Electra | 225 | 430/7.0L V8 |
| 1973 - 1974 | Buick | Century | Luxus | 455/7.5L V8 |
| 1970 - 1973 | Buick | LeSabre | Custom | 455/7.5L V8 |
| 1970 - 1974 | Buick | LeSabre | Base | 455/7.5L V8 |
| 1974 | Buick | LeSabre | Luxus | 455/7.5L V8 |
| 1970 - 1974 | Buick | Electra | 225 Custom | 455/7.5L V8 |
| 1973 - 1974 | Buick | Century | Base | 455/7.5L V8 |
| 1970 - 1974 | Buick | Riviera | Base | 455/7.5L V8 |
| 1970 - 1974 | Buick | Electra | 225 | 455/7.5L V8 |
| 1967 | Buick | Electra | Base | 430/7.0L V8 |
| 1970 - 1971 | Buick | Skylark | Base | 455/7.5L V8 |
| 1967 - 1968 | Buick | Skylark | Base | 400/6.6L V8 |
| 1973 - 1974 | Buick | Regal | Base | 455/7.5L V8 |
| 1970 - 1974 | Buick | Estate Wagon | Base | 455/7.5L V8 |
| 1967 - 1969 | Buick | Riviera | Base | 430/7.0L V8 |
| 1971 - 1973 | Buick | Centurion | Base | 455/7.5L V8 |
| 1970 - 1971 | Buick | Skylark | Custom | 455/7.5L V8 |
| 1970 - 1972 | Buick | GS 455 | Base | 455/7.5L V8 |
| 1970 | Buick | Sportwagon | Base | 455/7.5L V8 |
| 1967 - 1969 | Buick | Wildcat | Custom | 430/7.0L V8 |
| 1967 - 1969 | Buick | Wildcat | Base | 430/7.0L V8 |
| 1968 - 1969 | Buick | Sportwagon | Custom | 400/6.6L V8 |
| 1973 | Buick | Electra | Base | 455/7.5L V8 |
| 1968 | Buick | Skylark | Custom | 400/6.6L V8 |
| 1974 | Buick | Electra | 225 Limited | 455/7.5L V8 |
| 1968 - 1969 | Buick | Sportwagon | Base | 400/6.6L V8 |
| 1967 | Buick | Gran Sport | Base | 400/6.6L V8 |
| 1968 - 1969 | Buick | GS 400 | Base | 400/6.6L V8 |
| 1970 | Buick | Wildcat | Custom | 455/7.5L V8 |
| 1967 | Buick | Electra | Custom | 430/7.0L V8 |
| 1967 | Buick | Gran Sport | Base | / |
| 1970 | Buick | GS 455 | GSX | 455/7.5L V8 |
| 1971 | Buick | Riviera | Gran Sport | 455/7.5L V8 |
Specs:
| # of Teeth | 166 |
|---|---|
| Application | Buick |
| Brand | Hays |
| Center Bore (Register Diameter) | 2.486" |
| Emission Code | 5 |
| Engine Balance | External |
| Material | Steel |
| Product Type | Flexplates |
| SFI Approved | Yes |
| SFI Certification | 29.1 |
| Warranty | 90 Day |
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 ★★★★★
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Product Reviews
★★★★★ 5
This is a nice mat for floor exercises.
Color: Aqua, Style: 1-Inch
I had some lower back issues and went to physical therapy. I used this mat for my floor stretches and exercises at home along with my big rubber ball. It made the floor work so much more comfortable. Beware of the smell. When I unroll it I still smell that “memory foam” odor, which takes some getting used to. I aired it out as instructed, twice, and it persists. It’s a wonderful mat so the odor is not a deal breaker. I’d buy it again.
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Reviewed in the United States on April 26, 2026
★★★★★ 5
Love my mat!
Color: Pink, Style: 1/2 Inch
I’m new to stretching and recovery classes, and there is a lot of floor work. I was using the gym mats, but my knees, lower back, and glutes were hurting from being on the floor.
This mat is the perfect thickness and feels wonderful during floor exercises. It gives me the extra cushion I need without being difficult to use. It’s also lightweight, durable, easy to clean, and easy to roll up for transport. The pink makes me smile. That said , the mat makes the classes more enjoyable.
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Reviewed in the United States on May 2, 2026
★★★★★ 5
Great value
Color: Aqua, Style: 1-Inch
Perfect exercise mat. It is nice and thick, and comfortable to kneel and lay on. Can't comment on durability, but so far, so good. Recommended.
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Reviewed in the United States on May 14, 2026
★★★★★ 5
Thick, soft, perfect for my service dog to lay on in restaurants, etc.
Color: Blue, Style: 1/2 Inch
I bought this for my service dog to lay on in restaurants, etc. It's super thick and soft. I cut it in half and I'm using the other half for my dog to lay on in the car.
Excellent quality and I love the carry strap.
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Reviewed in the United States on June 7, 2026
★★★★★ 4
Comfortable and thick mat that’s great for workouts at home
Color: Black, Style: 1/2 Inch, Color: Black, Style: 1/2 Inch
I picked up this Amazon Basics extra thick exercise mat for home workouts, and it’s been a solid addition. The thickness is the first thing you notice—it provides good cushioning, especially for exercises where you’re on your knees, elbows, or back.
The surface has enough grip to keep you from slipping during most movements, whether you're doing stretching, core work, or basic workouts. It also stays in place pretty well on the floor without sliding around too much.
The mat rolls out flat easily and comes with a strap, which makes it convenient to store or carry if needed. It’s lightweight enough to move around but still feels durable.
It’s not a high-end studio mat, but for everyday workouts at home, it does exactly what you need it to do.
Pros:
• Extra thickness provides good cushioning
• Comfortable for floor exercises
• Lightweight and easy to store
• Good value for the price
Cons:
• Slight compression over time with heavy use
• Grip is good but not premium-level
Overall, this is a great budget-friendly mat for home workouts, stretching, or basic fitness routines.
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Reviewed in the United States on March 17, 2026