Gasket illustration – not the actual part
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Gasket illustration – not the actual partDiesel Parts Direct logo

Aftermarket parts may appear slightly different, including the packaging.

Cummins4BT / 6BTUpper Gasket Sets

Cummins 4089649 Upper Engine Gasket Set

Compatible With ISB, QSB, and Series Engines

Genuine Cummins Part

OEM #: 4089649SKU: 4089649
$904.94

Taxes and Shipping are calculated at checkout

Special Order Item - not eligible for return

Non-Returnable
SKU 4089649
OEM Number 4089649
Part Type Top Gasket Sets
OEM Brand CUMMINS

Aftermarket warranty

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Genuine Cummins parts warranty

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  • Orders are processed the same or next business day
  • Expedited shipping options available at Checkout
  • If same-day shipping is critical, please call to confirm availability

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Call any of our friendly Parts Dept. Specialists with your engine serial number, and we can quickly verify whether this part is the correct part for your engine — no guesswork.

Phone: 888.687.0539

Don't know how to find your engine serial number? Go to our Engine Help Center for assistance.