Intercooler Bar and Plate- 2011-2016 LML Chevrolet/GMC Sierra 2500HD 3500HD 6.6L Duramax | SPELAB

LML Duramax Bar-and-Plate Intercooler Overview

The 2011-2016 LML Duramax is a true towing powerhouse right out of the factory. However, when you start tuning, upgrading turbos, or towing heavy loads up steep grades, the factory charge air system quickly becomes the weakest link. The OEM intercooler relies on brittle plastic end tanks crimped to a thin core—a notorious recipe for boost leaks and catastrophic blowouts under load.

Don't let a cracked plastic tank leave you stranded. The SPELAB Heavy-Duty Bar-and-Plate Intercooler is your bulletproof solution. Engineered with indestructible Cast Aluminum End Tanks and a massive 3.35-inch thick core, this unit boasts a 34% larger volume than stock.

Measuring nearly 46 inches across, this massive thermal heat sink dramatically lowers Intake Air Temperatures (IATs) and keeps your Exhaust Gas Temperatures (EGTs) firmly in the safe zone during extreme towing. Built to handle 100+ PSI, it is the ultimate reliability upgrade for both hardworking stock LMLs and high-horsepower custom builds.

Bar-and-Plate Intercooler Fitment

• 2011 LML Chevrolet/GMC Sierra 2500HD 3500HD 6.6L Duramax
• 2012 LML Chevrolet/GMC Sierra 2500HD 3500HD 6.6L Duramax
• 2013 LML Chevrolet/GMC Sierra 2500HD 3500HD 6.6L Duramax
• 2014 LML Chevrolet/GMC Sierra 2500HD 3500HD 6.6L Duramax
• 2015 LML Chevrolet/GMC Sierra 2500HD 3500HD 6.6L Duramax
• 2016 LML Chevrolet/GMC Sierra 2500HD 3500HD 6.6L Duramax

Heavy-Duty Intercooler Key Features

• Indestructible Cast Aluminum End Tanks
  Tuned LML engines generate massive boost. We eliminated the weak factory plastic and weak welds in favor of solid, one-piece Cast Aluminum end tanks. They are optimized for maximum internal airflow and structurally capable of holding extreme boost pressures without ballooning.

• Massive 3.35" Bar-and-Plate Core (34% Larger)
  Featuring a 32.5% increase in core volume over the OEM tube-and-fin design. This competition-grade bar-and-plate construction offers immense thermal capacity, preventing heat soak and maintaining dense, cool air for your engine during back-to-back dyno pulls or long uphill tows.

• Drastic EGT Reduction
  By supplying a significantly cooler air charge to your Duramax, this intercooler directly combats the dangerously high EGTs often experienced in tuned or heavy-towing LML trucks, protecting your pistons and turbo.

• Reduced Pressure Drop
  The ultra-efficient core design allows your factory or upgraded turbo to breathe easier. This boosts turbo efficiency, reduces mechanical strain, and significantly sharpens throttle response.

• Premium T-Bolt Clamps Included
  To ensure your connections hold up to extreme boost, we include premium constant-tension T-bolt clamps for a blowout-proof installation at the intercooler joints.

Product Specifications

LML Duramax Bar-and-Plate Intercooler FAQs

Q: Why do I need Cast Aluminum tanks for my LML?
A: The factory LML intercooler uses plastic end tanks that become brittle from heat cycles and crack under increased boost. Cast aluminum provides the ultimate structural integrity, ensuring your intercooler will never blow apart, even on highly tuned trucks.

Q: Will this lower my Exhaust Gas Temperatures (EGTs) while towing heavy?
A: Yes! The massive 3.35-inch bar-and-plate core acts as a huge heat sink. It cools the intake air much more effectively than the thin factory unit, directly translating to significantly lower and safer EGTs when towing up steep grades.

Q: Does this intercooler require any cutting or modification to install?
A: No. Despite the massive 34% increase in core size, this intercooler is precision-engineered as a direct bolt-on replacement using the factory mounting points.

Q: Will this support a truck with upgraded turbos and aggressive tuning?
A: Absolutely. It is over-built to handle the increased airflow and extreme heat demands of heavily modified LML Duramax engines pushing high horsepower.

Q: Are intercooler pipes included?
A: This listing is for the heavy-duty intercooler and premium T-bolt clamps. Intercooler piping is sold separately. (We highly recommend upgrading your factory plastic cold-side pipe at the same time!)