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USD 287
Part #: BSTEGR654

Bostech EGR654 EGR Cooler

2004.5-2007 GM 6.6L Duramax LLY/LBZ (Must Check OE Number)
Part #: BSTEGR654
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The Bostech EGR654 EGR Cooler addresses the common failure of the EGR Cooler on your 2004.5-2007 GM 6.6L Duramax LLY/LBZ. 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 inmost 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# 97303654
  • 13 Month Unlimited Mileage Warranty
Application Note: 
It is important to check OE cooler for correct application. 
Also Fits 2004-2005 Chevrolet Kodiak/GMC Topkick 4500/5500 With Vin# 2
Some late 2006 LBZ trucks are equipped with a Tokyo Radiator Company EGR cooler #897358071. If you have this style, you must use the Bostech EGR507 EGR Cooler. 


  • MFG. Number EGR654
  • Manufacturer Name Bostech
  • Shipping Weight 5.00 lb.
  • Shipping Length 8 in.
  • Shipping Width 9 in.
  • Shipping Height 20 in.
  • Fuel Type Diesel
  • UPC 613111949832
  • 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

Do you have a cooler for the LB7 Duramax?
View Staff Answer 

No, unfortunately we do not offer the LB7 EGR cooler.

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.