EGR Coolers

EGR Coolers

An EGR cooler is a critical emissions and engine longevity component that recirculates a portion of exhaust gases back into the intake stream at a reduced temperature, lowering combustion temperatures and reducing NOx output in diesel and some gasoline engines. Factory EGR coolers are a known failure point on several popular diesel platforms, particularly the 6.0L and 6.4L Ford Power Stroke engines where coolant contamination from a cracked or failed cooler can cause catastrophic engine damage if not addressed promptly. Diesel truck owners, fleet operators, and performance builders choose upgraded or replacement EGR coolers to restore reliable function, improve coolant system longevity, and in some cases delete the EGR system entirely for off-road competition use. Understanding whether an upgrade or a delete solution is right for your application depends on the vehicle's intended use, state emissions requirements, and whether the truck is under warranty.

Popular Upgrades

Top-selling EGR cooler products include Mishimoto stainless steel EGR coolers for the 6.0L and 6.4L Power Stroke that use improved internal baffling and stronger materials to resist the coolant leak failures common on OEM units. EGR delete kits from Sinister Diesel and Dorman provide off-road-only solutions that remove the cooler and valve entirely, simplifying the coolant circuit and eliminating the most common failure mode on affected Ford diesel platforms. For 6.7L Cummins and LML Duramax applications, upgraded coolant reroute kits and improved OEM-specification replacements address lower-mileage failures before they cause head gasket or cylinder head damage.

Performance and Handling

A properly functioning EGR cooler maintains cooler intake charge temperatures, which supports consistent combustion and reduces the heat soak that contributes to power loss on hot driving days. On the 6.0L Power Stroke specifically, upgrading to a Mishimoto or Bullet Proof Diesel EGR cooler alongside an oil cooler replacement and head stud upgrade creates a comprehensive reliability package that addresses all three primary failure points on that platform. Delete solutions on off-road-only builds improve cooling efficiency slightly by simplifying the coolant circuit, but they remove emissions hardware and are not street legal in most jurisdictions.

Why do EGR coolers fail on the 6.0L Power Stroke?

The 6.0L Power Stroke EGR cooler fails primarily because the OEM design uses thin stainless steel plates that crack under repeated thermal cycling, allowing exhaust gases to contaminate the coolant with carbon buildup that eventually clogs the oil cooler and causes overheating. Ford issued TSBs related to EGR cooler and oil cooler failures throughout the 6.0L production run from 2003 to 2007, acknowledging the design limitations. Replacing the factory unit with a Mishimoto or Bullet Proof Diesel upgraded cooler, combined with an oil cooler flush and replacement, is the most comprehensive solution for preventing repeat failure.

Are EGR cooler upgrades street legal?

EGR cooler upgrades that replace the factory unit with a higher-quality equivalent while retaining the EGR system's function are fully street legal and emissions compliant. EGR delete kits that remove the cooler and valve entirely are considered off-road use only and violate EPA emissions regulations for vehicles driven on public roads, regardless of whether the vehicle passes a visual or tailpipe emissions test. Always confirm your state's specific emissions inspection requirements before installing any EGR-related modification.

Why These Parts Fit Right

EGR cooler replacements and upgrade kits in this collection are listed by specific engine family, model year, and chassis to ensure the correct coolant port dimensions, mounting configuration, and hardware are included. Product pages carry fitment notes for affected 6.0L and 6.4L Power Stroke, 6.7L Cummins, and Duramax applications to simplify selection. Fast shipping gets your replacement cooler on the way quickly, and our diesel-knowledgeable support team can help with any fitment or install question.

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