How do I confirm pilotpart235717 fits my machine?

Compare the OEM or reference part number, machine model, engine model, and serial number. You can also submit a fitment inquiry before ordering.

In Stock

Muffler Silencer 4284449 For Hitachi Excavator EX300-2 EX300-3 Isuzu Engine 6SD1-TPD

For Hitachi Muffler

Muffler 4284449 for Hitachi

OEM / REF: 4284449SKU: pilotpart235717

Muffler Silencer 4284449 For Hitachi Excavator EX300-2 EX300-3 Isuzu Engine 6SD1-TPD is a Muffler replacement part indexed for Part Number and Hitachi Excavator EX300-2 EX300-3 Isuzu Engine 6SD1-TPD Muffler Silencer 4284449. Match OEM part number 4284449 and confirm fitment for Hitachi Engine Spare Parts before orde...

Stock: In stock
Condition: New
Fitment: Hitachi Engine Spare Parts
Category: Muffler

Fitment support before you order
Worldwide delivery options

In stock — ready to order

$476.20USD/EA

~~$75,280.00~~Save 99%

Estimated delivery by quantity

Estimated delivery windows
Qty	Estimated delivery
1	Aug 22 – Aug 29
10	Aug 20 – Aug 27
50	Aug 18 – Aug 25

Estimates from today; confirm exact lead time before payment.

Quantity

Buy online now or add to your quote list for bulk pricing and fitment confirmation.

Confirm fitment before ordering →

Lead times can vary by freight route and customs. Contact support for expedited shipping.

Muffler Description

This Muffler is indexed for Part Number; Hitachi Excavator EX300-2 EX300-3 Isuzu Engine 6SD1-TPD Muffler Silencer 4284449. Compare reference number 4284449 against the label on your existing Hitachi component before ordering.

Before checkout, compare OEM part number 4284449, connector layout, mounting position, and machine serial number. For high-value or fitment-sensitive parts, submit the fitment form below so support can verify the match.

Part Numbers and Cross References

4284449

Applications

Part Number
Hitachi Excavator EX300-2 EX300-3 Isuzu Engine 6SD1-TPD Muffler Silencer 4284449

Specifications

Part Number	4284449

Fitment Notes

Brand or application signal: Hitachi Engine Spare Parts
Product family: Muffler
System category: Engine Spare Parts > Emission & Exhaust System > Muffler
Recommended verification: OEM number, engine model, serial number, old part photos, and dimensions.

Shipping & Returns

Availability: InStock
Shipping: Shipping quotes can be confirmed before payment for heavy or urgent orders.
Returns: Returns are easier when fitment is confirmed before ordering.
B2B support: Bulk, fleet, and repair-shop requests can be handled through the inquiry form.

Frequently Asked Questions

How do I confirm this part fits my machine?

Match the OEM or reference number first, then verify machine model, engine model, serial number, connector layout, mounting points, and old part photos.

Can I order if my part number is not listed?

Yes. Send the old part number, machine plate, and photos through the fitment inquiry form. Support can review possible replacements or alternatives.

Is this an OEM part?

Products are indexed as replacement parts unless explicitly marked otherwise. Always compare reference numbers and confirm fitment before purchase.