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Description
Hays Twister Full Race Torque Converter, Ford C4 - 97-2E28FOverview: Hays Twister Full Race Torque Converters feature a custom designed anti balloon plate to stop any converter ballooning and swelling in racing situations. These torque converters are designed for use with a trans brake and great for power adders such as nitrous, superchargers, and turbos. They are available with various RPM stall speed offerings to accommodate any mixture of modifications including higher compression ratios, aftermarket
Overview:
Hays Twister Full Race Torque Converters feature a custom designed anti-balloon plate to stop any converter ballooning and swelling in racing situations. These torque converters are designed for use with a trans-brake and great for power adders such as nitrous, superchargers, and turbos. They are available 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.
Features:
- All Full Race series converters are built, tested, and proven to support up to 1,000 horsepower
- Features a custom anti-balloon plate designed to stop potential torque converter ballooning
- Designed to handle the extreme shock and abuse of trans-brakes, nitrous oxide, superchargers, and turbochargers
- 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 torque 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.
- Full Race series torque converters are offered in several different stall speeds for popular automatic 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 | 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 - 1979 | Mercury | Cougar | 351/5.8L V8 | |
| 1977 | Lincoln | Versailles | 351/5.8L V8 | |
| 1977 - 1979 | Ford | Thunderbird | 351/5.8L V8 | |
| 1977 - 1979 | Ford | Ranchero | 351/5.8L V8 | |
| 1977 | Ford | F-250 | 351/5.8L V8 | |
| 1977 | Ford | F-250 | 300/4.9L l6 | |
| 1978 | Ford | F-150 | 300/4.9L l6 | |
| 1978 | Ford | F-150 | 351/5.8L V8 | |
| 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 | 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 - 1978 | Mercury | Cougar | 400/6.6L V8 | |
| 1977 - 1981 | Mercury | Cougar | 302/5.0L V8 | |
| 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 | |
| 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 | |
| 1978 | Ford | F-150 | 460/7.5L V8 | |
| 1978 | Ford | F-150 | 400/6.6L V8 | |
| 1978 | Ford | F-150 | 302/5.0L V8 | |
| 1978 | Ford | F-100 | 400/6.6L V8 | |
| 1978 - 1981 | Ford | F-100 | 302/5.0L V8 | |
| 1978 - 1979 | Ford | Fairmont | 302/5.0L V8 | |
| 1978 - 1981 | Ford | Fairmont | 200/3.3L l6 | |
| 1978 - 1981 | Ford | Fairmont | 140/2.3L l4 | |
| 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 | |
| 1980 - 1981 | Mercury | Zephyr | 255/4.2L V8 | |
| 1980 - 1981 | Ford | Granada | 255/4.2L V8 | |
| 1980 - 1981 | Ford | Fairmont | 255/4.2L V8 | |
| 1980 - 1981 | Mercury | Cougar | 255/4.2L V8 | |
| 1980 - 1981 | Mercury | Cougar | 200/3.3L l6 | |
| 1981 | Mercury | Cougar | 140/2.3L l4 | |
| 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 | |
| 1981 | Ford | Granada | 140/2.3L l4 | |
| 1981 | Ford | F-100 | 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 |
Specs:
| Anti-Balloon Plate | Yes |
|---|---|
| Balanced | Yes |
| Bolt Circle | 10-1/2" |
| Brand | Hays |
| Crank Pilot Diameter | 1.375" |
| Diameter | 10" |
| Emission Code | 5 |
| Input Spline | 26 |
| Lock Up/Overdrive | No |
| Product Type | Automatic Transmission Torque Converter |
| Series | Full Race |
| Stall | 2800-3200 |
| Transmission | C4 Case-Filled |
| Use with Power Adder | Yes |
| Use with Trans-Brake | Yes |
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
4.9 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
Great little speakers
Size: 5.25” Woofer, Size: 5.25” Woofer
These make great surround speakers, and they just sound good
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 22, 2026
★★★★★ 5
Good Speakers - Good Reputation - Good Purchase
Size: 5.25” Woofer
Good sounding, high quality speakers. These are Klipsch...enough said.
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Reviewed in the United States on March 31, 2026
★★★★★ 5
Klipsch R50 M next generation
Size: 5.25” Woofer
In spite of small size sound is very nice iam using it with a subwoofer and with my yamaha A4A AV receiver i like it iam hearing mostly heavy metal and the speakers have a nice punch and attack
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Reviewed in the United States on February 18, 2026
★★★★★ 4
compact surrounds that blend well with the right setup
Size: 4” Woofer
I picked up the Klipsch R‑40M as part of a full 5.1 system built around the R‑50M fronts and the R‑50C center. My original plan was to use another pair of R‑50M speakers in the back, but they simply didn’t fit in the rear cabinet space I have. The R‑40M ended up being the only model that fit comfortably, so they became my surround channels.
In terms of build quality, they feel solid and consistent with the rest of the Reference Next‑Gen line. The copper woofers and updated horn design give them the same visual identity as the larger models, which helps the whole system look cohesive. They’re compact enough to place in tighter spaces without compromising too much on performance.
Sonically, the R‑40M does a respectable job as a surround speaker. Effects are clear, directional cues are easy to follow, and they integrate smoothly with the more powerful R‑50M fronts. That said, they are noticeably less powerful than the R‑50M, so you need to spend a little time balancing your levels. Once I bumped their channel trim a bit and adjusted the distance settings, the rear soundstage locked in nicely and felt much more even.
They won’t deliver the same fullness or dynamic punch as the larger models, but for rear channels that’s usually not a deal breaker. What matters is clarity and consistency, and the R‑40M handles both well. Movies with active surround mixes feel immersive, and ambient effects wrap around the room without calling attention to the speakers themselves.
If you’re building a system where space is limited in the back, the R‑40M is a practical and capable choice. Just be prepared to fine tune your calibration so they match the output of the bigger speakers up front. Once dialed in, they round out a 5.1 setup very effectively.
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Reviewed in the United States on January 22, 2026
★★★★★ 5
Great Bang for the Buck!
Size: 5.25” Woofer
These R50 Studio Monitors are worth every penny. One could easily spend a heck of a lot more to get less. Have been a pro audio engineer my entire life. These monitors kick out clean, solid bass and accurate highs. Klipsch did a excellent job designing these monitors. Perfect for smail spaces where fidelity is critical. If you wall mount these, make sure you leave at least a 1.5 inch air gap between the back of the monitor and the wall. These units are sweet.
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Reviewed in the United States on July 22, 2025