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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CMA
Houston, US
★★★★★ 5
Favorite treat
Flavor Name: Duck & Veggies, Size: 5 Ounce (Pack of 1)
My dog loves these treats the best, and the spoiled pooch has tried many! I love that these are super small sized, not messy, and low calorie which allows for lots of reinforcement while training. I also appreciate that the ingredients are very clean.
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Reviewed in the United States on December 8, 2025
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Amazon Customer
Cuba, US
★★★★★ 5
Buy these only if you love your dog
Flavor Name: Duck & Veggies, Size: 5 Ounce (Pack of 1)
I was looking for a dog treat that didn’t have sugar. And let me tell you these training treats are not only delicious to the dogs, but I love that the ingredients do not include any sweetener. I don’t think it’s a good idea to give our dogs tons of sugar, unless we’re brushing their teeth every day like we do for our own teeth. So for the longevity of my puppies teeth, she’s gonna get these high-quality yummy Yum‘s. I love that I can break them apart and make more treats out of the treats they gave so the bag last for months, even with daily training.
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Reviewed in the United States on February 14, 2026
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kelly
Port Orchard, US
★★★★★ 5
Puppy Says YUM
Flavor Name: Duck & Veggies, Size: 5 Ounce (Pack of 1)
My girl loves these, and they fit most of the treat dispensing toys we have. Perfect for quick training treats too!
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Reviewed in the United States on December 11, 2025
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Megan Mangini
Whiting, US
★★★★★ 5
Perfection!
Flavor Name: Duck & Veggies, Size: 5 Ounce (Pack of 1)
Wonderful treat. My pups go wild and bounce around with pure joy. I have to hide the bag because these two figured out a whole MacGyver plot to snag them when I wasn’t looking. Cheeky little boys.
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Reviewed in the United States on December 8, 2025
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RedMan
Alexandria, US
★★★★★ 4
Great for training or even a special treat just because.
Flavor Name: Duck & Veggies, Size: 5 Ounce (Pack of 1)
Odin loves them.
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Reviewed in the United States on December 30, 2025

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