In-frame overhaul kit illustration – not the actual part
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In-frame overhaul kit illustration – not the actual partDiesel Parts Direct logo

Aftermarket parts may appear slightly different, including the packaging.

Cummins4BT / 6BTOverhaul Kits

DS-IF-4089669 In-Frame Overhaul Kit For Cummins Engines

Compatible With B5.9 B6.7, ISB6.7, and QSB Engines

OEM #: IF4089669SKU: DSIF4089669

Ships in 1-2 days

$1,265.11

Taxes and Shipping are calculated at checkout

Special Order Item - not eligible for return

The standard DS-IF4089669 In-Frame Overhaul Kit includes the following parts:

  • 12 Connecting Rod Bearings
  • 1 In-Frame Gasket Set
  • 1 Main Bearing Set
  • 6 Piston Kits
  • 6 Piston Pins

Overhaul kits are serial number and CPL specific.

SKU DSIF4089669
OEM Number IF4089669
Part Type Overhaul Kits
OEM Brand CUMMINS

Aftermarket warranty

View full warranty details
  • 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.