The 6.6L (403 CID) Duramax LMM is a 90-degree V8 diesel engine produced from 2007 through 2010 and feature aluminum cylinder heads with four valves per cylinder. Unlike other engines in the category instead of utilizing double overhead camshafts in each head, with its related complexity, GM achieved equivalent breathing capabilities with a single camshaft, pushrods, and dual rockers. Compression ratio is a heavy 16.8:1 while the cylinder configuration is oversquare – unusual for a diesel engine, with a bore of 4.055" (103 mm) and a stroke: 3.897" (99 mm) inside the cast iron block.
Intake air is compressed by a Garrett variable vane turbocharger (VVT and air-to-air intercooler. Fuel is delivered by a 26,000 psi Bosch high pressure common rail with CP3 injection pump. The Duramax 6.2L LMM engine offered a slight increase in horsepower (+5) and torque (+10) over the LBZ. 2010 was the last model year that the LMM was available, as it was replaced by the more powerful, more efficient LML for the 2011 model year. The LMM develops 365 horsepower at 3,100 rpm and torque of 660 lb-ft at 1,800 rpm.
There’s a simple solution to gain back some of that horsepower and torque. The Spectre 9982 air intake system for 2007 – 2010 Chevrolet Silverado 2500 and 3500, and GMC Sierra 2500 and 3500 6.2L diesel, brings performance increases that can be achieved by a DIY installation that takes under an hour with simple hand tools and no re-calibration of engine electronics required.
The way to achieve increased horsepower and torque, particularly with a turbocharged diesel engine, is to deliver more and cooler air. The electronics will feed fuel into the cylinder to match the detected temperature and volume of the intake flow. The greater volume of cooler air that can be fed into the cylinder will result in greater volume of fuel being injected, delivering the sought-after increase in power.
In addition, the powdercoated heat shield protects the intake flow from under-hood temperatures so only cold, fresh, outside air is directed to the engine intake. A velocity stack draws air in from the filter and into the textured black cast aluminum air intake tube that’s smoother with fewer bends providing higher air flow capacity that the OEM hose, which connects directly to the Duramax throttle body.
The Spectre 9982 air intake system utilizes a non-woven synthetic filter media to help protect your engine from harmful debris.
The Spectre HPR air filter element is washable and reusable. To maintain its performance, clean your Spectre filter after every 30,000 to 50,000 miles of normal driving, or more frequently if you drive in dusty conditions. The Spectre AccuCharge Precision Air Filter Cleaning and Oiling System part number HPR4820 was formulated specifically for Spectre HPR air filters and its precision oiling system features graduations on the bottle for precise measuring and an easy-to-use squirt top making the application a breeze. The system comes complete with a pump spray bottle of filter cleaner and one of filter oil, which is made from only pure food grade mineral oil.
The Spectre 9982 intake system is designed for the following vehicles:
2010 GMC SIERRA 3500 HD 6.6L V8 Diesel Engine - All Models