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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
4.6 ★★★★★
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Product Reviews
★★★★★ 5
MAELREG Clothing Looks Great!
Love this quarter zip. MAELREG makes some comfortable, sharp looking clothing. Their golf apparel is fantastic. The value is worth it. Their shirts are true to size. I am 6', 215lbs and wear an XL, which fits nicely.
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Reviewed in the United States on February 16, 2026
★★★★★ 5
Great for Tall Guys
I got this for my husband, he has a pullover that he has worn for years and it needed replacing. Finding one like this that was lightweight and loose fit was a big challenge. He loves the quality and fabric and its not hot but still helps when their is a breeze or chill. I liked that the color and pattern are versatile for all seasons. He is 6'5 and it actually fits his torso! Just get it!
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Reviewed in the United States on February 9, 2026
★★★★★ 5
It’s a hit!
Color: Brown Grey Camo, Size: Large
I picked on of these up after seeing it online. I have multiple Maelreg items and all are great quality. They are my go to golf and casual clothing brand. Super comfortable, soft, light weight, and perfect fit. Olive on the east coast and this color is all the rage in the area. These are some of the best value 1/4 zips out there.
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Reviewed in the United States on February 3, 2026
★★★★★ 5
great look
Color: Pink Small Fish, Size: Large
I am a many time customer of this provider. Excellent always - never an issue on look or fit.
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Reviewed in the United States on April 14, 2026
★★★★★ 4
Had to return due to wrong size sent
Color: Pink Artichoke, Size: Small
Really wanted to keep this - but I ordered a S and rcvd an XL. This was heavier than I was expecting. Pink was really cute too.
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Reviewed in the United States on May 14, 2026