SKU: 57298574105

1978 - 2021 Navistar International & Fire Apparatus 4100-4400, MV, HV, 7300-7700, 8500, 8600, S-Series, Amtran, 9000 Series, Lonestar, Prostar And Paystar 5000 Rear Helper Spring 55-037

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Description

1978 - 2021 Navistar International & Fire Apparatus 4100-4400, MV, HV, 7300-7700, 8500, 8600, S-Series, Amtran, 9000 Series, Lonestar, Prostar And Paystar 5000 Rear Helper Spring 55-037Number of Leaves 4 Leaf Spring Width 3" A Leaf Spring Length: 19 3 4" B Leaf Spring Length: 19 3 4" C Leaf Spring Arch: 3" D Leaf Spring Pack Thickness: 1 7 16" Leaf Spring Capacity: 2,250 lbs. Leaf Spring OEM Number: 473725C91 Leaf Spring Eye Bushings: Front Slipper Rear Slipper Leaf Spring Material: 4 . 360 Location Rear Verify the OEM part number and measurements to confirm compatibility before purchasing. Need help? Visit: How to Identify a Leaf

  • Number of Leaves - 4
  • Leaf Spring Width - 3"
  • A - Leaf Spring Length: 19-3/4"
  • B - Leaf Spring Length: 19-3/4"
  • C - Leaf Spring Arch: 3"
  • D - Leaf Spring Pack Thickness: 1-7/16"
  • Leaf Spring Capacity: 2,250 lbs.
  • Leaf Spring OEM Number: 473725C91
  • Leaf Spring Eye Bushings: Front Slipper / Rear Slipper
  • Leaf Spring Material:  4/.360
  • Location - Rear


Verify the OEM part number and measurements to confirm compatibility before purchasing. Need help? Visit: How to Identify a Leaf Spring.

 

Leaf spring 55-037 is the rear helper spring for Navistar International 4100-4400, MV607, MV607H, 7300-7700, HV507, HV513, HV607, HV613, 8500, 8600 Series 1400-8300, S-Series, 1400-8300, Amtran Genesis, Amtran FE, RE, Paystar 5000, 9100-9900, Lonestar, Prostar, LT625 and RH613. Also fits Fire Apparatus Ferrara, Pierce and Emergency One. This spring is 3" wide, is a 4 leaf spring and has a capacity of 2,250 lbs. The OEM part number is 473725C91.


Models And Year Ranges:

Fits: 2002-2021 Rear Navistar International 4100, 4200, 4300, 4400, MV607 And MV607H

Fits: 2002-2021 Rear Navistar International 7300, 7400, 7500, 7600, 7700, HV507, HV513, HV607, GV613, 8500 And 8600

Fits: 1978-1988 Rear Navistar International S Series

Fits: 1987-2012 Rear Navistar International 1400-1652

Fits: 1989-202 Rear Navistar International 2554-2674

Fits: 1989-2004 Rear Navistar International 3000, 3400-3900

Fits: 1989-2003 Rear Navistar International 4500-4900

Fits: 1988-2003 Rear Navistar International 7100, 8100-8300

Fits: To 2004 Rear Navistar International Amtran Genesis, Amtran FE And RE; IC, CE, FE And RE

Fits: Rear Navistar International Paystar 5000

Fits: 1981-2021 Rear Navistar International 9100-9900, Lonestar, Prostar, LT625 And RH613

Fits: Fire Apparatus Pierce (With International Suspension)

Fits: Fire Apparatus Ferrara

Fits: Fire Apparatus Emergency One (With International Suspension)

Shipping Notes
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Exchange/Return Notes
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SKU: 57298574105

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4.1 ★★★★★
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Allison
Carnegie, US
★★★★★ 5
Supportive, Comfortable & Super Flattering
Size: 42DD, Color: White
I’m really impressed with this bra! It offers great support while still feeling comfortable enough to wear all day. The fit is flattering and smooth under clothes, and I love that it provides full coverage without feeling bulky. The material feels soft and well made, and the underwire gives just the right amount of lift and shape. It’s a great everyday bra that actually looks and feels good on, definitely a win!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 27, 2026
E
Verified Purchase
Emily
Bozeman, US
★★★★★ 5
Absolutely Love!
Size: 40D, Color: Warm Beige
I lost some weight and wanted a new bra. I love a minimizer. I randomly bought this and thought I'd try it. Seriously...I absolutely love it. I was a bra merchandiser for a VERY large company for years, so I have bought and tried on hundreds of bras. This bra holds, gives amazing shape and is so comfy. The straps are wide so they won't fall down. The band is tight but comfy. The wite doesn't poke. The fabric is soft and stretchy. The unlined cups lift and give you great shape. If you are thinking about it, do it. You won't be sorry!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 18, 2026
R
Verified Purchase
R.P.
Lexington, US
★★★★★ 4
Comfortable and supportive. Didn't last as long as some of the other colors.
Super comfortable and supportive. Color and design were cute. Only issue is the wire broke through after a few months. Have bought many others from this same seller and had better luck with how long they lasted. I would buy again because of comfort if it goes on sale. Green and light blue one were also comfortable but long lasting. Nude colored one digs in under bust and doesn't have as much softness around wires.
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Reviewed in the United States on May 13, 2026
S
Verified Purchase
S
Cuba, US
★★★★★ 3
Wire pops out! Great shape and comfort
Size: 34D, Color: Oatmeal Heather
They last a couple months, but I wear these about once a week. The wire pops out enough (I have 4-5 of these), that I always carry a back up bra. The wire hurts and breaks skin, and moleskin doesn’t fix it. The minimizing and support is pretty good and the bra is comfortable, it just doesn’t last very long which is a shame. I will still buy them because it is a great fit, but I wish they reinforced the wire closing. I have a small band and large cup and it looks pretty good under tighter Tshirts.
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Reviewed in the United States on May 13, 2026
E
Verified Purchase
Eklektos
Omaha, US
★★★★★ 5
Very happy with the way this bra fits, feels, and looks!
Size: 38C, Color: Sargasso
38C size I am really happy with this bra. It has good coverage. Nothing spills out. It is two layers of fabric but no padding and no foam lining, so it does prevent some show-through but doesn't add bulk or size. It is slightly minimizing--maybe 1/2 inch off my bust, but doesn't smash me flat. It keeps good separation and support. The shoulder straps also stay in place! I get so tired of putting straps back on my shoulders that slide off over and over. The color is gorgeous. I may order more. I want to see how this holds up after washing and wearing several times, but it's beautiful and so far, I love it!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 24, 2025

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