SKU: 18870937778

Overhaul Rebuild Kit for Yanmar 4TNA78 Engine YB401 YB401W Excavator

$323.10 $359.00
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Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Aug 9 - Aug 14

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Overhaul Rebuild Kit for Yanmar 4TNA78 Engine YB401 YB401W ExcavatorApplication: For Engine: Anmar 4TNA78Yanmar Construction Equipment (SF) YB401, (SF) YB401W Excavator, and so on models with 4TNA78 Engine Notice: The Cylinder Liner is a Semi finished type. Content: Including: 1 Set of Overhaul Gasket Kit4 Cylinder Liners4 Pistons STD4 Piston Pins8 Snap Rings4 Rod BushingsSet Rings For 4 Pistons STD1 Set of Main Bearings1 Set of Rod Bearings1 Set of Thrust Bearings4 Intake Valves4 Exhaust Valves8 Valve Guides4 Intake

Application:

For Engine: Anmar 4TNA78Yanmar Construction Equipment (SF) YB401, (SF) YB401W Excavator, and so on models with 4TNA78 Engine

Notice:

The Cylinder Liner is a Semi-finished type.

Content:

Including:1 Set of Overhaul Gasket Kit
4 Cylinder Liners
4 Pistons STD
4 Piston Pins
8 Snap Rings
4 Rod Bushings
Set Rings For 4 Pistons STD
1 Set of Main Bearings
1 Set of Rod Bearings
1 Set of Thrust Bearings
4 Intake Valves
4 Exhaust Valves
8 Valve Guides
4 Intake Valves Seats
4 Exhaust Valves Seats

NOTICE:

Please send us your engine's nameplate and your model's nameplate after you order this product([email protected])

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 18870937778

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4.4 ★★★★★
Based on 23 reviews
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Product Reviews
M
Verified Purchase
Mike
San Leandro, US
★★★★★ 5
Great sound mat for the price!
Style: 50 mil 50 SqFt, Style: 50 mil 50 SqFt
This is a good product. Many people go with KILMAT because of the value to price point. I did as well. When you clean the surface (in my case it was all painted metal) this stuff sticks very well. I do recommend you use a seam roller of some type, I used Lumiteco 3 piece roller set. This will help with adhesion and mostly flatten the overlapped edges. It also helps you see where you have rolled as it leaves little grooves. The difference when we had no sound mats and after was very impressive. We haven't finished our install yet and it is quieter than when we had an interior in the van. There are thicker mats available in other brands, but this will work great for our van build, but this helps keep the weight down. It is quality material, just be careful when you are removing the backing, the edge of the foil face can cut you. I suggest you layout where you are installing the mat and cut to fit. From what I have read, you don't need to cover every inch in the vehicle, just spot install for a big difference. I chose to cover most surfaces to help keep sound out when we are sleeping in the van. We haven't finished putting the van yet, but we have driven it around and been very satisfied with this product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 3, 2025
P
Verified Purchase
Paul
Massapequa, US
★★★★★ 5
Excellent sound deadening mats
Style: 80 mil 36 sqft, Style: 80 mil 36 sqft
Purchased these for a 2020 Lexus RX350 due to the hollow sound of the car doors when shutting. They sounded cheap. The mats are super sticky and I applied them when the doors were hot from sitting in the sun. They alubutyl sticks like crazy and the end result was perfect. Now I have solid sounding doors. Good quality product.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
A
Verified Purchase
Amazon Customer
Fort Morgan, US
★★★★★ 5
Awesome product 👌
Style: 50 mil 50 SqFt, Style: 50 mil 50 SqFt
I love this stuff. I use it alot. Sticks great Easy to use Molds super easy Really helps with sound. Great product. I wish I could get sponsored for this product on my projects..
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 30, 2026
J
Verified Purchase
john l fields
Fort Morgan, US
★★★★★ 5
Good product at a good price
Style: 80 mil 36 sqft
This product works great and easy to install. I do two or more vehicles a month. I switch to this brand a year ago and would recommend to everyone of my customers
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 16, 2026
N
Verified Purchase
napoli
Lake Worth, US
★★★★★ 4
Good deal for the price
Style: 80 mil 18 SqFt
The product is good and contrary to some comments I read it was not a mess to install and went on very nicely. That said I placed on a 71 Baracudda and starting from a 71db I was able to drop that down to about 66 with two layers Kilmatt 80mil
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 18, 2026

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