SKU: 91831231667

1984 - 2021 Kenworth C500, C550B, K100E, T400, T450, T600 And T800 Front Leaf Spring - 9 Leaves - 59-410

Sale price$300.38 Regular price$333.75
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Description

1984 - 2021 Kenworth C500, C550B, K100E, T400, T450, T600 And T800 Front Leaf Spring - 9 Leaves - 59-410*Diagram Spring May Differ From Actual Spring* Number of Leaves 9 Leaf Spring Width 4" A Leaf Spring Length: 32" B Leaf Spring Length: 32" C Leaf Spring Arch: 3 7 8" D Leaf Spring Pack Thickness: 5 1 2" Leaf Spring Capacity: 9,200 lbs. Leaf Spring OEM Number: K223 1134 Leaf Spring Eye Threaded Bushings: Front TB 68 Rear TB 68 Leaf Spring Material: 8 . 625, 1 . 499 Location Front Verify the OEM part number and measurements to confirm compatibility

  • *Diagram Spring May Differ From Actual Spring*
  • Number of Leaves - 9
  • Leaf Spring Width - 4"
  • A - Leaf Spring Length: 32"
  • B - Leaf Spring Length: 32"
  • C - Leaf Spring Arch: 3-7/8"
  • D - Leaf Spring Pack Thickness: 5-1/2"
  • Leaf Spring Capacity: 9,200 lbs.
  • Leaf Spring OEM Number: K223-1134
  • Leaf Spring Eye Threaded Bushings: Front TB-68 / Rear TB-68
  • Leaf Spring Material: 8/.625, 1/.499
  • Location - Front


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

 

Leaf spring 59-410 is the front leaf spring on Kenworth C500B, C550B, K100E Cab Over Engine, T400A, T400B, T450, T450B, T600A, T600B, T800 and T800B heavy duty trucks. The spring is 4" wide, is a 9 leaf spring and the capacity is 9,200 lbs. The OEM part number is K223-1134.


Models And Year Ranges:

Fits: 1988-2021 Front Kenworth C500B and C550B

Fits: 1984-2003 Front Kenworth K100E Cab Over Engine (With Set Back Axle)

Fits: 1988-2003 Front Kenworth T400A, T400B, T450 and T450B

Fits: 1985-2004 Front Kenworth T600A, T600B, T800 and T800B

Shipping Notes
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Exchange/Return Notes
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SKU: 91831231667

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A
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Amazon Customer
Carnegie, US
★★★★★ 5
Work as well as the NGK's
Bought for a 2016 Mazda 6, I had NGK's in it for 5 months and had misfires, didnt have the money to throw more NGK's at it for troubleshooting. Bought these to try and they work great so far.
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Reviewed in the United States on April 29, 2026
C
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Christopher D. Bodirsky
Dallas, US
★★★★★ 4
Faulty plug? Otherwise great set
Definitely better than the old plugs that probably had 80k miles on them. The one star off is because I had a misfire after installing. Not sure if I damaged the plug or what, but a reinstall didn't fix the misfire. In my genius, I rushed to try to gap it and ended up breaking the iridium tip. Put the old plug into cylinder 3 (where the misfire was) and it was fine. Gonna have to get a new single tomorrow at my local shop, but a bit frustrating to get a misfire after install.
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Reviewed in the United States on April 27, 2026
B
Verified Purchase
Britincali
Birmingham, US
★★★★★ 5
Upgrade from OEM
After seeing a quite ludicrous $403 quote to change 4 spark plugs in a Mazda3 I decided to show my son how easy it is. These were an upgrade from OEM parts. They were gapped perfectly for the car. They took 20mins to fit and work fine.
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Reviewed in the United States on February 11, 2026
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ANDRES FIGUEROA
Cuba, US
★★★★★ 5
Very good
The best quality. Runs like new again.
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Reviewed in the United States on March 12, 2026
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Ale
West Palm Beach, US
★★★★★ 1
garbage spark plugs
misfired after 30 minutes of driving cylinder 4 misfire code, left me stranded on the highway with baby in car. “(9621)” at the end of description is a lie, was not compatible with my vehicle even with compatibility test.
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Reviewed in the United States on May 17, 2026

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