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Description
Hays Billet Steel SFI Certified Flywheel - Big Block Ford - 12-240Overview: Hays Steel Flywheels are manufactured from certified billet material that will not break up under the stress of high RPM and severe punishment of racing. All Hays flywheels are certified S. F. I. spec 1. 1. This flywheel fits the big block internal balanced 352, 390, 427, 428, 429, 460 CID Ford for 1965 through 1972. This is a 184 tooth flywheel that weighs 40 lbs. Requires an 11 in Borg Beck Long or Mark XII clutches. This flywheel is
Overview:
Hays Steel Flywheels are manufactured from certified billet material that will not break up under the stress of high RPM and severe punishment of racing. All Hays flywheels are certified S.F.I. spec 1.1. This flywheel fits the big block internal balanced 352, 390, 427, 428, 429, 460 CID Ford for 1965 through 1972. This is a 184 tooth flywheel that weighs 40 lbs. Requires an 11 in Borg-Beck Long or Mark XII clutches. This flywheel is thicker than stock and may require a bellhousing spacing or a Lakewood bellhousing to eliminate interference. Flywheel bolts included. Other applications available.
Features:
- Fits BB Ford With Internal Balance
- 184 Tooth Flywheel
- Weighs 40 Lbs
- Requires 11 In Bbl Or Mark Xii Clutches
- Thicker Than Stock
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| 1970 | Mercury | Marquis | 390/6.4L V8 | |
| 1970 - 1973 | Mercury | Marquis | 429/7.0L V8 | |
| 1970 - 1973 | Mercury | Monterey | 429/7.0L V8 | |
| 1971 - 1974 | Mercury | Monterey | 400/6.6L V8 | |
| 1971 - 1978 | Mercury | Marquis | 400/6.6L V8 | |
| 1971 - 1973 | Mercury | Colony Park | 429/7.0L V8 | |
| 1971 - 1974 | Mercury | Colony Park | 400/6.6L V8 | |
| 1971 | Lincoln | Mark III | 460/7.5L V8 | |
| 1971 - 1978 | Lincoln | Continental | 460/7.5L V8 | |
| 1971 - 1973 | Ford | Thunderbird | 429/7.0L V8 | |
| 1971 - 1978 | Ford | Thunderbird | 400/6.6L V8 | |
| 1971 | Ford | M-400 | 390/6.4L V8 | |
| 1971 - 1978 | Ford | LTD | 400/6.6L V8 | |
| 1971 | Ford | LTD | 390/6.4L V8 | |
| 1971 - 1973 | Ford | LTD | 429/7.0L V8 | |
| 1971 - 1972 | Ford | F-350 | 390/6.4L V8 | |
| 1971 - 1972 | Ford | F-250 | 390/6.4L V8 | |
| 1971 - 1972 | Ford | F-100 | 390/6.4L V8 | |
| 1971 - 1973 | Ford | Country Sedan | 429/7.0L V8 | |
| 1971 - 1974 | Ford | Country Sedan | 400/6.6L V8 | |
| 1971 | Ford | Country Sedan | 390/6.4L V8 | |
| 1972 - 1974 | Mercury | Monterey | 460/7.5L V8 | |
| 1972 - 1978 | Mercury | Marquis | 460/7.5L V8 | |
| 1970 | Mercury | Monterey | 390/6.4L V8 | |
| 1972 - 1974 | Mercury | Colony Park | 460/7.5L V8 | |
| 1972 - 1976 | Lincoln | Mark IV | 460/7.5L V8 | |
| 1972 - 1976 | Ford | Thunderbird | 460/7.5L V8 | |
| 1972 - 1978 | Ford | LTD | 460/7.5L V8 | |
| 1972 - 1974 | Ford | Country Sedan | 460/7.5L V8 | |
| 1973 - 1997 | Ford | F-350 | 460/7.5L V8 | |
| 1973 - 1996 | Ford | F-250 | 460/7.5L V8 | |
| 1973 - 1979 | Ford | F-100 | 460/7.5L V8 | |
| 1975 - 1976 | Mercury | Montego | 460/7.5L V8 | |
| 1975 - 1976 | Mercury | Montego | 400/6.6L V8 | |
| 1975 - 1979 | Ford | F-150 | 460/7.5L V8 | |
| 1975 - 1976 | Ford | Elite | 460/7.5L V8 | |
| 1975 - 1976 | Ford | Elite | 400/6.6L V8 | |
| 1975 - 1996 | Ford | E-350 Econoline | 460/7.5L V8 | |
| 1975 - 1991 | Ford | E-250 Econoline Club Wagon | 460/7.5L V8 | |
| 1975 - 1980 | Ford | E-250 Econoline | 460/7.5L V8 | |
| 1975 - 1977 | Ford | Custom 500 | 400/6.6L V8 | |
| 1975 - 1976 | Ford | Custom 500 | 460/7.5L V8 | |
| 1975 - 1978 | Mercury | Grand Marquis | 460/7.5L V8 | |
| 1975 - 1978 | Mercury | Grand Marquis | 400/6.6L V8 | |
| 1975 - 1976 | Mercury | Cougar | 460/7.5L V8 | |
| 1975 - 1978 | Mercury | Cougar | 400/6.6L V8 | |
| 1975 - 1976 | Ford | Torino | 460/7.5L V8 | |
| 1975 - 1976 | Ford | Torino | 400/6.6L V8 | |
| 1975 - 1977 | Ford | Ranchero | 460/7.5L V8 | |
| 1975 - 1978 | Ford | Ranchero | 400/6.6L V8 | |
| 1975 - 1976 | Ford | Gran Torino | 460/7.5L V8 | |
| 1975 - 1976 | Ford | Gran Torino | 400/6.6L V8 | |
| 1977 - 1982 | Ford | F-350 | 400/6.6L V8 | |
| 1977 - 1982 | Ford | F-250 | 400/6.6L V8 | |
| 1977 - 1979 | Ford | F-150 | 400/6.6L V8 | |
| 1977 - 1979 | Ford | F-100 | 400/6.6L V8 | |
| 1977 - 1996 | Ford | E-350 Econoline Club Wagon | 460/7.5L V8 | |
| 1978 | Ford | E-100 Econoline | 460/7.5L V8 | |
| 1978 - 1979 | Ford | Bronco | 400/6.6L V8 | |
| 1977 - 1979 | Lincoln | Mark V | 400/6.6L V8 | |
| 1977 - 1979 | Lincoln | Continental | 400/6.6L V8 | |
| 1977 - 1978 | Lincoln | Mark V | 460/7.5L V8 | |
| 1977 - 1978 | Ford | LTD II | 400/6.6L V8 | |
| 1980 - 1982 | Ford | E-350 Econoline Club Wagon | 400/6.6L V8 | |
| 1980 - 1982 | Ford | E-350 Econoline | 400/6.6L V8 | |
| 1980 - 1982 | Ford | E-250 Econoline Club Wagon | 400/6.6L V8 | |
| 1980 | Ford | E-250 Econoline | 400/6.6L V8 | |
| 1980 | Ford | E-100 Econoline | 400/6.6L V8 | |
| 1996 | Ford | Econoline Super Duty | 460/7.5L V8 | |
| 1997 | Ford | F-250 HD | 460/7.5L V8 |
Specs:
| # of Teeth | 184 |
|---|---|
| Application | Ford |
| Brand | Hays |
| Emission Code | 5 |
| Engine | Big Block Ford |
| Engine Balance | Internal |
| Material | Steel |
| Product Type | Flywheels |
| SFI Approved | Yes |
| SFI Certification | 1.1 |
| Warranty | Limited 90 Day Warranty |
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
4.8 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 1
Burned my already sensitive feet, too big
Color: Pink & Beige, Size: Medium/Large(fits size 8 to 11)
Feels icky, and the heat gets trapped and literally felt like my feet were being burned by these. The bottoms of these feel prickly and they are way too big. You have to sit still and cannot walk in them.
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Reviewed in the United States on April 22, 2026
★★★★★ 5
Just as good as paraffin wax
Color: Pink & Beige, Size: Medium/Large(fits size 8 to 11)
I might prefer these socks over paraffin wax. They are comfy and very moisturizing. I use these socks once a week to keep the heels and soles of my feet moisturized between pedicures. I rinse with warm, soapy water then hang to dry. They are hard to walk in, but there's a saying printed in the socks that's says something to the effect of "take a break, stay off your feet" lol I love that as a reminder to put my feet up and relax
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Reviewed in the United States on April 9, 2026
★★★★★ 5
Love these!
Color: Pink & Beige, Size: Small(fits up to size 7)
Love these! As I write this review, I’m sitting in my recliner with these on. I have had other silicone socks in the past and would like to share a few of the things that I have learned.
These fit great! The others were 2-3 sizes too big because you could not order a size. I wear a size 7 women’s shoe. I got the smaller size. I walked around my apartment in my old ones and they got kinda yucky. Now, I sit in my recliner, put them on and chill for a few hours. I now take them off and put in a ziplock bag so they stay nice and clean (no cat hair!). I use them once a week usually on Saturday or Sunday as I’m a working girl. Also, I use Auqaphor before I put them on and put cotton socks on after I’m finished. Your feet will be SO soft. This is not a one and done…I do this every week especially during sandal season! I know this was lengthy and I hope you got some tips.
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Reviewed in the United States on April 25, 2026
★★★★★ 5
Absolute game changer for chronically dry feet/cracked heels
Size: S (up to size 7)-Beige
I had recently bought a pair of silicone heel/ankle wraps to fill out my boot a little since I noticed my heels were lifting when I was skating. I tested them out around the house and noticed they left my heels softer while the rest of my sockless feet got quite dry. So I got these full foot silicone socks to see the effect of having my whole foot covered. I slather the entirety of my feet with Dr. Scholl's Severe Cracked Heel Restoring Balm (love how convenient it is to apply it to my feet with the solid stick form) and then slip them into these silicone socks. After just a couple hours, when I pull out my feet they're (a teeny bit sweaty at first), but then overall soft and smooth and have absorbed the balm fully leaving barely any residue in the silicone sock. I find these silicone socks generally comfortable; I wear them in the evenings while relaxing on the couch, take them off after a couple hours and let my feet breathe a bit, and then reapply my balm and socks and wear them to bed. If I wake up in the middle of the night, which I almost always do (not because of the socks), I'll take the socks off and allow my feet to breathe again. I wear a woman's size 6 shoe and the small size is pretty comfortable. However, I made the mistake of wearing them while being on my feet for a couple hours straight during household chores -- they must've somehow cut off my circulation a bit with the standing, so I wouldn't recommend wearing these silicone socks while being active. And since they're not exactly my foot size, they slide around sometimes and will start to feel tight at my big toe. But if that happens, I just tug on the toe area of the sock to give my big toe more wiggle room and problem solved. Prior to wearing these socks, I was soaking and doing heavy duty exfoliation of my feet every week. These socks seem like they'll work to help me extend the time between soakings and exfoliations. The 5 pack is a great value. So far none have torn, so they seem rather durable. Not sure what I could even do to tear a hole in these.
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Reviewed in the United States on January 16, 2026
★★★★★ 5
Works wonders
Size: M (up to size 9)-Beige
Works wonders for dry feet, like really dry, hard feet.
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Reviewed in the United States on February 23, 2026