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USD 749.95
Part #: BSTEGR783

Bostech EGR783 EGR Cooler

2003-2006 Cummins ISX
Part #: BSTEGR783
$ $749.95
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The Bostech EGR783 EGR Cooler addresses the common failure of the EGR Cooler on your 2003-2006 Cummins ISX. Bostech has the EGR cooler problem solved. Most OEM coolers are failing due to cracking, which causes the water and exhaust to mix, or from becoming clogged with exhaust deposits. Bostech has developed a process making the cooler much more reliable and maintenance free.

The Bostech design uses T304 stainless steel tubing to replace the turbulator design used in most OEM coolers. The stainless steel tubing is tig welded to precision laser cut plates that are attached to the cooler housing. This will ensure the cooler will operate under the toughest of environments. This is a must for mass transit vehicles like school buses, ambulances, and wreckers/rollbacks.


  • Remanufactured 
  • Upgraded Design
  • Replaces OE Part# 2881782NX, 4309434NX, 4956008NX
  • 13 Month Unlimited Mileage Warranty


  • MFG. Number EGR783
  • Manufacturer Name Bostech
  • Shipping Weight 15.00 lb.
  • Shipping Length 9 in.
  • Shipping Width 9 in.
  • Shipping Height 22 in.
  • UPC 613111955536
  • Warranty Yes
  • Warranty Info 13 Month / Unlimited Mileage
  • Prop 65 WARNING: Cancer & Reproductive Harm -


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Questions and Answers

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Most Popular Questions

Is the EGR cooler EPA compliant, and will it pass DOT emission inspection. I have a small fleet of trucks, that I carry military components with, because I deal with the government I have to pass periodic testing on the emissions system, if I replaced my 30 trucks egrs coolers with the Bostech unit are they going to give me a certification that it is withing EPA compliance
View Staff Answer 

The Bostech replacement EGR Coolers do not come with any documentation for DOT inspection. They do work in conjunction with the entire factory emission system and do not alter the functions of the EGR in any way. I would check with the testing facility to see if they require any specific certification.

I have a 2006 Peterbilt 387 with a Cummins ISX motor, Will this work for my application and do you have it in stock?
View Staff Answer 

The Bostech EGR Cooler Upgrade EGR783 replaces Cummins OE Part#: 2881783NX & 4956008NX. Please call Cummins with your VIN# to verify your OEM to match this EGR replacement. The EGR783 is normally in stock, but we ask that you call to verify availability before you place your order.

Emissions Notice

This product is not legal for sale or street use in California. Certain aftermarket products are subject to governmental emission standards regulated by the California Air Resources Board. In order for these products to be legal on a specific vehicle in California, the part number must receive a CARB Executive Order (EO) number. This number makes the part legal for use only on specific years, makes and models of vehicles. A decal with CARB EO number for these parts must be displayed in the engine bay to satisfy smog inspection requirements.