FITMENT
- 2007.5-2010 6.6L Chevrolet Silverado Duramax LMM 2500HD / 3500HD.
- 2007.5-2010 6.6L GMC Sierra Duramax LMM 2500HD / 3500HD
- Note: Standard pickup models only. Does NOT fit Cab & Chassis commercial truck frames.
DESCRIPTION
Product Overview
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The 2007.5–2010 LMM Duramax is a workhorse, but its factory intake is a massive bottleneck. The stock setup forces hot exhaust and oily PCV mist into a narrow elbow with a bulky throttle valve—creating a thick, sticky sludge that chokes your engine and kills throttle response.
- Even worse, the stock LMM EGR cooler is a ticking time bomb. It is highly prone to internal thermal cracking, allowing coolant to slip into your cylinders and blow your head gaskets.
- Our High-Flow Intake Elbow & EGR Delete Kit solves both issues at once. It completely deletes the cracked cooler risk while swapping out the choked-up factory elbow for a seamless, wide-open high-flow pipe.
Key Features
- Heavy-Duty Construction: CNC-machined from 6061 billet aluminum and high-grade stainless steel. Premium high-temp O-rings ensure a lifetime, leak-free seal even under high boost.
- Massive Airflow Boost: Ditches the restrictive factory butterfly throttle valve, increasing fresh air intake flow by up to 80% for instant throttle response.
- Lower EGTs & Coolant Temperatures: By routing hot exhaust away from the engine, EGTs drop, and your entire cooling system runs significantly cooler.
- Built-in 1/8" NPT Port: The aluminum elbow features a pre-tapped 1/8" NPT port with a flush plug—making it effortless to install a boost gauge, water-methanol, or nitrous nozzle.
FAQ
Q: What is the difference between this "High-Flow Kit" and the standard LMM EGR Delete Kit?
A: The standard kit only blocks the EGR, leaving the restrictive stock elbow and butterfly valve in place. This High-Flow Kit replaces that entire bottleneck with a wide-open, mandrel-bent pipe—increasing airflow by 80% for faster turbo spool-up and crisper throttle response.
Q: What is the pre-tapped 1/8" NPT port on the intake elbow used for?
A: It is a built-in expansion port for easy upgrades. Use it to directly mount an aftermarket boost gauge, water-methanol, or nitrous nozzle without drilling into your new aluminum elbow. If you don't need it, just keep the included flush plug bolted in tight.
Q: What happens to the stock butterfly throttle valve electronics after installing this elbow?
A: Since High-Flow Elbow completely removes the restrictive factory butterfly valve, you will simply unplug the electrical connector going to the factory valve actuator. Be sure to wrap the open truck-side harness plug with high-quality electrical tape or cover it with a heat-shrink cap to protect it from road debris, dust, and moisture.
Q: Why should I upgrade my turbo downpipe while installing the LMM EGR delete?
A: Factory downpipe is crushed into a restrictive "pancake" shape behind the turbo. Upgrading to 3" High-Flow Downpipe eliminates this bottleneck—dropping EGTs by an extra 50°F to 100°F, speeding up turbo spool, and letting your engine breathe freely.
