How do I confirm pilotpart235612-01 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 7Y-1978 For Caterpillar Excavator CAT 350 350 L Engine 3306

For Caterpillar Muffler

Muffler 7Y-1978 for Caterpillar

OEM / REF: 7Y-1978SKU: pilotpart235612-01

Muffler Silencer 7Y-1978 For Caterpillar Excavator CAT 350 350 L Engine 3306 is a Muffler replacement part indexed for Part Number and Caterpillar Excavator CAT 350 350 L Engine 3306 Muffler Silencer 7Y-1978, with 3 application records on file. Match OEM part number 7Y-1978 and confirm fitment for Caterpillar Engine...

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

Fitment support before you order
Worldwide delivery options

In stock — ready to order

$565.74USD/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.

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

Muffler Description

This Muffler is indexed for Part Number; Caterpillar Excavator CAT 350 350 L Engine 3306 Muffler Silencer 7Y-1978; Engine:3306 Model:Caterpillar Excavator CAT 350 350 L See Details: 350 &350 L Excavators 2ZL00001-UP (MACHINE) POWERED BY 3306 Engine 350 &350 L Excavators 8HK00001-UP (MACHINE) POWERED BY 3306 Engine 350 350L TRACK-TYPE EXCAVATORS 7RK00001-UP (MACHINE) POWERED BY 3306 ENGINE. Compare reference number 7Y-1978 against the label on your existing Caterpillar component before ordering.

Before checkout, compare OEM part number 7Y-1978, 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

7Y-1978

Applications

Part Number
Caterpillar Excavator CAT 350 350 L Engine 3306 Muffler Silencer 7Y-1978
Engine:3306 Model:Caterpillar Excavator CAT 350 350 L See Details: 350 &350 L Excavators 2ZL00001-UP (MACHINE) POWERED BY 3306 Engine 350 &350 L Excavators 8HK00001-UP (MACHINE) POWERED BY 3306 Engine 350 350L TRACK-TYPE EXCAVATORS 7RK00001-UP (MACHINE) POWERED BY 3306 ENGINE

Specifications

Part Number	7Y-1978,7Y1978

Fitment Notes

Brand or application signal: Caterpillar 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.