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Description
Hays Twister 3/4 Race Torque Converter, Ford C4 Case-Filled - 97-2D28QOverview: Hays Performance Drivetrain is proud to announce Twister 3 4 Race Performance Torque Converters. These NEW torque converters are a perfect addition to Hays product line of performance flexplates, clutches, and flywheels. The 3 4 Race torque converter is the first series being brought to market and is intended for street strip combinations, with various RPM stall speed offerings to accommodate any mixture of modifications including higher
Overview:
Hays Performance Drivetrain is proud to announce Twister 3/4 Race Performance Torque Converters. These NEW torque converters are a perfect addition to Hays product line of performance flexplates, clutches, and flywheels. The 3/4 Race torque converter is the first series being brought to market and is intended for street/strip combinations, with various RPM stall speed offerings to accommodate any mixture of modifications including higher compression ratios, aftermarket camshafts, aftermarket cylinder heads, lower gear ratios, and vehicle weight loss.
The name 3/4 Race perfectly describes a torque converter suited for an application just shy of a Full Race version. We do plan to offer Full Race torque converters in the near future.
Good names never go away, and neither should good terms!
Hays Twister 3/4 Race Torque Converters!
Features:
- 3/4 Race series converters are built, tested, and proven to support up to 650 HP
- State of the art Spray Welding process is used in select areas. Spray Welding provides clean, strong and consistent fusion while also increasing strength through hardening from higher process temperature
- Each converter is hand-built and inspected in every step of assembly to ensure top of the line quality
- All HAYS converters are internally welded compared to brazing. Testing has shown welding provides longer converter life while also enhancing consistency
- Heavy duty Torrington bearings are used for greater strength and durability
- Stators are chosen with high flow vents and channels to promote cooling in heat producing higher horsepower applications
- Increased horsepower and acceleration due to a weight saving, one application design. Almost all HAYS converters are built for one application to reduce weight compared to a multi-bolt pattern converter.
- 3/4 Race series converters are offered in several different stall speeds for GM, Ford, and Chrysler transmissions
- Industry leading Tech Support Team is available to provide assistance with stall speed selection
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| 1977 | Mercury | Monarch | 351/5.8L V8 | |
| 1977 - 1979 | Mercury | Cougar | 351/5.8L V8 | |
| 1977 - 1979 | Ford | LTD II | 351/5.8L V8 | |
| 1977 - 1980 | Ford | LTD | 351/5.8L V8 | |
| 1977 | Ford | Granada | 351/5.8L V8 | |
| 1977 | Ford | F-350 | 351/5.8L V8 | |
| 1977 | Ford | F-350 | 300/4.9L l6 | |
| 1977 | Ford | F-250 | 351/5.8L V8 | |
| 1977 | Ford | F-250 | 300/4.9L l6 | |
| 1977 | Lincoln | Versailles | 351/5.8L V8 | |
| 1977 - 1979 | Ford | Thunderbird | 351/5.8L V8 | |
| 1977 - 1979 | Ford | Ranchero | 351/5.8L V8 | |
| 1978 | Ford | F-150 | 351/5.8L V8 | |
| 1978 | Ford | F-150 | 300/4.9L l6 | |
| 1978 | Ford | F-100 | 351/5.8L V8 | |
| 1978 - 1981 | Ford | F-100 | 300/4.9L l6 | |
| 1980 | Mercury | Marquis | 351/5.8L V8 | |
| 1980 | Mercury | Grand Marquis | 351/5.8L V8 | |
| 1977 - 1980 | Mercury | Monarch | 302/5.0L V8 | |
| 1977 - 1980 | Mercury | Monarch | 250/4.1L l6 | |
| 1977 | Mercury | Monarch | 200/3.3L l6 | |
| 1977 - 1978 | Mercury | Cougar | 400/6.6L V8 | |
| 1977 - 1981 | Mercury | Cougar | 302/5.0L V8 | |
| 1977 - 1978 | Ford | LTD II | 400/6.6L V8 | |
| 1977 - 1979 | Ford | LTD II | 302/5.0L V8 | |
| 1977 - 1978 | Ford | LTD | 460/7.5L V8 | |
| 1977 - 1978 | Ford | LTD | 400/6.6L V8 | |
| 1977 - 1980 | Ford | LTD | 302/5.0L V8 | |
| 1977 - 1980 | Ford | Granada | 302/5.0L V8 | |
| 1977 - 1980 | Ford | Granada | 250/4.1L l6 | |
| 1977 - 1981 | Ford | Granada | 200/3.3L l6 | |
| 1977 | Ford | F-350 | 460/7.5L V8 | |
| 1977 | Ford | F-350 | 400/6.6L V8 | |
| 1977 | Ford | F-350 | 302/5.0L V8 | |
| 1977 | Ford | F-250 | 460/7.5L V8 | |
| 1977 | Ford | F-250 | 400/6.6L V8 | |
| 1977 | Ford | F-250 | 302/5.0L V8 | |
| 1978 - 1979 | Mercury | Zephyr | 302/5.0L V8 | |
| 1978 - 1981 | Mercury | Zephyr | 200/3.3L l6 | |
| 1978 - 1981 | Mercury | Zephyr | 140/2.3L l4 | |
| 1977 | Mercury | Comet | 302/5.0L V8 | |
| 1977 | Mercury | Comet | 250/4.1L l6 | |
| 1977 | Mercury | Comet | 200/3.3L l6 | |
| 1977 - 1979 | Mercury | Capri | 171/2.8L V6 | |
| 1977 - 1981 | Mercury | Capri | 140/2.3L l4 | |
| 1977 - 1979 | Mercury | Bobcat | 171/2.8L V6 | |
| 1977 - 1980 | Mercury | Bobcat | 140/2.3L l4 | |
| 1977 - 1980 | Lincoln | Versailles | 302/5.0L V8 | |
| 1977 - 1978 | Ford | Thunderbird | 400/6.6L V8 | |
| 1977 - 1981 | Ford | Thunderbird | 302/5.0L V8 | |
| 1977 - 1978 | Ford | Ranchero | 400/6.6L V8 | |
| 1977 - 1979 | Ford | Ranchero | 302/5.0L V8 | |
| 1977 | Ford | Ranchero | 460/7.5L V8 | |
| 1977 - 1979 | Ford | Pinto | 171/2.8L V6 | |
| 1977 - 1980 | Ford | Pinto | 140/2.3L l4 | |
| 1977 - 1978 | Ford | Mustang II | 302/5.0L V8 | |
| 1977 - 1978 | Ford | Mustang II | 171/2.8L V6 | |
| 1977 - 1978 | Ford | Mustang II | 140/2.3L l4 | |
| 1977 | Ford | Maverick | 302/5.0L V8 | |
| 1977 | Ford | Maverick | 250/4.1L l6 | |
| 1977 | Ford | Maverick | 200/3.3L l6 | |
| 1978 | Ford | F-150 | 400/6.6L V8 | |
| 1978 | Ford | F-150 | 302/5.0L V8 | |
| 1978 | Ford | F-150 | 460/7.5L V8 | |
| 1978 | Ford | F-100 | 400/6.6L V8 | |
| 1978 - 1981 | Ford | F-100 | 302/5.0L V8 | |
| 1979 | Mercury | Capri | 302/5.0L V8 | |
| 1979 - 1981 | Mercury | Capri | 200/3.3L l6 | |
| 1979 | Ford | Mustang | 302/5.0L V8 | |
| 1979 - 1981 | Ford | Mustang | 200/3.3L l6 | |
| 1979 | Ford | Mustang | 171/2.8L V6 | |
| 1979 - 1981 | Ford | Mustang | 140/2.3L l4 | |
| 1978 - 1979 | Ford | Fairmont | 302/5.0L V8 | |
| 1978 - 1981 | Ford | Fairmont | 200/3.3L l6 | |
| 1978 - 1981 | Ford | Fairmont | 140/2.3L l4 | |
| 1980 - 1981 | Mercury | Zephyr | 255/4.2L V8 | |
| 1980 | Mercury | Monarch | 255/4.2L V8 | |
| 1980 | Mercury | Marquis | 302/5.0L V8 | |
| 1980 | Mercury | Grand Marquis | 302/5.0L V8 | |
| 1980 - 1981 | Mercury | Cougar | 255/4.2L V8 | |
| 1980 - 1981 | Mercury | Cougar | 200/3.3L l6 | |
| 1980 - 1981 | Mercury | Capri | 255/4.2L V8 | |
| 1980 - 1981 | Ford | Thunderbird | 255/4.2L V8 | |
| 1980 - 1981 | Ford | Thunderbird | 200/3.3L l6 | |
| 1980 - 1981 | Ford | Mustang | 255/4.2L V8 | |
| 1980 - 1981 | Ford | Granada | 255/4.2L V8 | |
| 1980 - 1981 | Ford | Fairmont | 255/4.2L V8 | |
| 1981 | Mercury | Cougar | 140/2.3L l4 | |
| 1981 | Ford | Granada | 140/2.3L l4 | |
| 1981 | Ford | F-100 | 255/4.2L V8 |
Specs:
| Anti-Balloon Plate | No |
|---|---|
| Balanced | Yes |
| Bolt Circle | 10-1/2"" |
| Brand | Hays |
| Crank Pilot Diameter | 1.375"" |
| Diameter | 10"" |
| Emission Code | 5 |
| Input Spline | 24 |
| Lock Up/Overdrive | No |
| Product Type | Automatic Transmission Torque Converter |
| Series | 3/4 Race |
| Stall | 2800-3200 |
| Transmission | C4 Case-Filled |
| Use with Power Adder | No |
| Use with Trans-Brake | No |
| Warning | California Proposition 65 |
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
4.2 ★★★★★
Based on 7 reviews
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Product Reviews
★★★★★ 5
Good al tacto
Size: Small, Color: Light Khaki
Good price & quality
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 10, 2026
★★★★★ 5
Exactly what I wanted,
Size: Large, Color: Light Khaki
I bought three pairs of shorts from three different companies and these are my favorite. I am going to by another pair in a different color.
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Reviewed in the United States on April 17, 2026
★★★★★ 5
Comfortable Water‑Repellent Summer Shorts That Still Look Casual and Neat
Size: XX-Large, Color: Dark Grey
I find these TACVASEN 7 Inch Casual Twill Shorts very comfortable to wear for warm weather. The polyester twill fabric feels light against the skin and does not trap heat, which makes them a good option for summer days or humid climates. The material also behaves like a water‑repellent, quick‑dry fabric, so light splashes or a bit of sweat do not linger long, and the shorts dry fairly fast instead of staying damp.
The overall look is more refined than basic athletic shorts, which I appreciate. The 7‑inch inseam, flat front style, and elastic waistband with drawstring give them a casual, everyday look that can still pass for more polished casual wear if you pair them with a polo or a clean t‑shirt. They do not look sloppy, so they work for running errands, casual outings, or relaxed social situations, not just for the beach or lounging.
In terms of construction, the stitching on my pair is nicely done, with no loose threads or obvious defects on the seams or hems. The shorts include two slant pockets and one back pocket, and one of the front pockets has a hidden zipper pocket inside, which is handy for keeping small items like cards or coins more secure without changing the outside look of the shorts. The elastic waistband and drawstring make it easy to dial in the fit without feeling tight.
Based on my experience, these shorts would be suitable for a variety of uses such as casual walks, light outdoor activities, beach days, or as comfortable everyday summer shorts that still look presentable enough for casual gatherings. If you want something breathable, quick drying, and a bit more polished than pure gym shorts, these are a solid option.
I received this item for free through the Amazon Vine program and I personally evaluate what I receive. I also pay taxes, Social Security and Medicare so I do not treat this as mindless ordering of products I will not use or fully test.
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Reviewed in the United States on April 19, 2026
★★★★★ 5
Perfect Summer Shorts for Everyday Wear
Size: Large, Color: Dark Grey
These turned out to be one of those purchases that will become part of the regular summer rotation. The fit is excellent, the fabric feels lightweight without feeling cheap, and they’re extremely comfortable in warm weather.
What I like most is that they strike a really nice balance between casual and polished. They don’t look like gym shorts, but they’re just as comfortable. The dark grey color looks clean and versatile, and the 7-inch length feels modern without being overly short.
The fabric has a smooth, cool feel and dries quickly, which is great for hot days or even light water exposure. The elastic waistband and drawstring are comfortable without looking sloppy, and the hidden zipper pocket is actually very useful for keys or cards.
Another thing I noticed is their durability that they hold their shape well and the material doesn’t wrinkle easily. They work equally well for relaxing, walking around town, travel, or casual dinners outside during summer.
Overall, these feel more expensive than they are. Comfortable, lightweight material, practical, and surprisingly stylish.
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Reviewed in the United States on May 22, 2026
★★★★★ 5
Fast drying polyester short for casual wear or to use at the beach
Size: Small, Color: Army Green, Size: Small, Color: Army Green
The TACVASEN men's 7" casual beach shorts are lightweight stretchy polyester shorts featuring an elastic waist band for added comfort. These shorts are nicely constructed and durable with no visible signs of defects out of the package. These shorts wear and feel comfortable for all types of activities or for just casual wear if you just want to lounge around. There are two average sized pockets one on each side and one zippered side pocket for added security and a rear pocket suitable for a normal sized wallet. I'm a 5'10" man and these shorts reach to the top of my knee. These shorts also have an average sized drawstring for added tightness if desired. The polyester material allows for fast drying. Overall these shorts offer a good value for wearing to most occasions.
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Reviewed in the United States on June 1, 2026