Intercooler Bar and Plate - 2006-2010 6.6L Duramax LMM LBZ Chevrolet/GMC Sierra 2500HD 3500HD | SPELAB

LBZ/LMM Duramax Bar-and-Plate Intercooler Overview

The 2006-2010 Duramax engines—especially the legendary LBZ and the powerhouse LMM—are famous for their incredible tuning potential. However, pushing 500+ horsepower and running high-boost tunes easily overwhelms the factory charge air system. The OEM intercooler relies on weak plastic end tanks that are practically guaranteed to split or explode under heavy load and high PSI.

Stop leaving your performance to chance. The SPELAB Heavy-Duty Bar-and-Plate Intercooler is the ultimate bulletproof upgrade for your Duramax. We replaced the fragile factory design with indestructible Cast Aluminum End Tanks and a massive 3.35-inch thick Bar-and-Plate core.

Boasting a 34% larger core volume and stretching an impressive 46 inches in overall length, this competition-grade heat sink drastically lowers Intake Air Temperatures (IATs) and keeps your Exhaust Gas Temperatures (EGTs) firmly in check. Whether you are towing heavy through the mountains, running an upgraded turbo, or tearing up the drag strip, the SPELAB intercooler delivers the strength and cooling efficiency your LBZ/LMM demands.

Bar-and-Plate Intercooler Fitment

• 2006 Chevrolet/GMC Sierra 2500HD & 3500HD with 6.6L Duramax LBZ engine
• 2007 Chevrolet/GMC Sierra 2500HD & 3500HD with 6.6L Duramax LBZ engine
• 2007.5 Chevrolet/GMC Sierra 2500HD & 3500HD with 6.6L Duramax LMM engine
• 2008 Chevrolet/GMC Sierra 2500HD & 3500HD with 6.6L Duramax LMM engine
• 2009 Chevrolet/GMC Sierra 2500HD & 3500HD with 6.6L Duramax LMM engine
• 2010 Chevrolet/GMC Sierra 2500HD & 3500HD with 6.6L Duramax LMM engine

Heavy-Duty Intercooler Key Features

• Indestructible Cast Aluminum End Tanks
  Tuned LBZ and LMM engines generate massive boost pressures. We eliminated the weak plastic tanks and flimsy sheet-metal welds in favor of solid Cast Aluminum. These tanks are aerodynamically optimized for maximum internal airflow and structurally built to hold 100+ PSI without ballooning or leaking.

• Massive 3.35" Bar-and-Plate Core (34% Larger)
  Featuring a 32.5% increase in core volume over the stock tube-and-fin design. This heavy-duty bar-and-plate construction offers immense thermal capacity, preventing "heat soak" during back-to-back dyno pulls or aggressive street driving.

• Extreme EGT Reduction
  By supplying a significantly cooler, denser air charge to your intake manifold, this intercooler directly combats the dangerously high EGTs associated with high-horsepower tunes and heavy towing, protecting your engine internals.

• Reduced Pressure Drop for Faster Spool
  The ultra-efficient, large-volume core minimizes restriction. This allows your factory or upgraded turbocharger to spool faster, reduces mechanical strain, and significantly sharpens your throttle response.

Product Specifications

LBZ/LMM Bar-and-Plate Intercooler FAQs

Q: Will this fit both the LBZ and LMM engines?
A: Yes, it is fully compatible as a direct bolt-on replacement for both the 2006-2007 LBZ and the 2007.5-2010 LMM engine platforms.

Q: Why do I need Cast Aluminum tanks for my tuned Duramax?
A: The factory intercooler uses plastic end tanks that become brittle and easily crack under increased boost levels from aftermarket tunes. Cast aluminum provides the ultimate structural integrity, ensuring your intercooler will never blow apart when you hit the throttle.

Q: Does this intercooler require any cutting or modification to install?
A: No. Despite the massive 34% increase in core size and 46-inch overall length, this intercooler is precision-engineered to drop right into the factory mounting locations.

Q: Will this support a truck with upgraded turbos and aggressive fueling?
A: Absolutely. With its huge thermal mass and 100+ PSI pressure tolerance, it is over-built to handle the extreme airflow and heat demands of heavily modified LBZ and LMM engines.

Q: Are intercooler pipes included?
A: This listing is for the heavy-duty intercooler and premium T-bolt clamps. Upgraded intercooler piping is sold separately. (Highly recommended for tuned trucks!)