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.

Cummins6CTA / ISC / QSCOverhaul Kits

DS-IF4089646 In-Frame Overhaul Kit For Cummins Engines

Compatible With 6C8.3, ISC, Isl, QSC, and QSL Engines

OEM #: IF4089646SKU: DSIF4089646
$3,069.23

Taxes and Shipping are calculated at checkout

Special Order Item - not eligible for return

This kit includes the following parts:

  • Upper Engine Gasket Set
  • Cylinder Kits
  • Main Bearings
  • Rod Bearings
  • Oil Pan Gasket

Overhaul kits are serial number and CPL specific.

SKU DSIF4089646
OEM Number IF4089646
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

View full shipping policy

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.