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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
4.0 ★★★★★
Based on 2213 reviews
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Product Reviews
★★★★★ 5
New Favorite Desk Chair
This chair is exactly what I was looking for! It is simple to put together, very sturdy and very comfortable. I typically tend to sit criss cross while at my desk and I can do that very comfortably with it. Im a bigger girlie so a chair that can hold weight or deal with me shifting positions was very important to me.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 25, 2026
★★★★★ 4
Comfortable chair
Color: Cream, Size: PU Leather(No Wheels)
Ordered this chair for my daughter for Christmas. It's a great chair. It's very comfortable. She wishes it had wheels. I didn't see a way to add wheels to this base, either. Still a good chair. You have to make sure where you put it you can spin to get out of it. Pushing it back and forth on carpet doesn't work well.
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Reviewed in the United States on March 8, 2026
★★★★★ 5
Great Office Chair
I purchased this chair to replace the old one in my son's room. I really like the look and style of this chair. It was easy for me to assemble and the riser functions really good and the stability of the base is very good. I like the wide design as it has more back support and seat support.
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Reviewed in the United States on January 23, 2026
★★★★★ 5
Comfortable, Stylish, and Great for Casual Seating
The OLIXIS Criss Cross Legged Chair is a really nice option if you prefer sitting cross-legged or want a wider, more relaxed seating style compared to a traditional office chair. The armless design and wide seat make it easy to shift positions throughout the day without feeling restricted.
Comfort-wise, the padding is decent and supportive for short to moderate sitting sessions. The adjustable height and swivel function work smoothly, and it’s easy to find a comfortable position whether you’re working at a desk, doing makeup, or just using it casually in a bedroom or home office setup.
The minimalist look is also a plus—it blends well with modern decor and doesn’t take up as much visual space as bulky office chairs. Assembly was fairly straightforward and didn’t take long.
One thing to note is that since it has no wheels, it’s not ideal if you need to move around your workspace frequently. Also, while it’s comfortable, it may not be the best choice for long, full workdays compared to a high-back ergonomic chair with more lumbar support.
Overall, this is a stylish and functional chair that works great for light office use, studying, or casual seating—especially if you like the criss-cross sitting position.
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Reviewed in the United States on April 29, 2026
★★★★★ 5
Absolutely LOVEEE
I loooove this chair. I work from home and it is so comfortable to sit in any position. It is great for sitting criss cross but you can also sit normal or on your knees. Very stable and easy to put together. Great quality
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026
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