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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Factory 2007.5–2010 LMM Duramax engines suffer from severe charge-air restriction and critical thermal failure risks in the stock intake and emissions layout. The OEM intake elbow and throttle valve assembly introduce a tight bottleneck, where recirculated EGR soot and PCV oil mist combine to form a dense, airflow-choking sludge. Concurrently, constant thermal cycling causes internal fatigue cracking within the factory EGR cooler core—allowing pressurized coolant to leak directly into the combustion chambers, risking severe hydrolock and catastrophic head gasket failure.
- Engineered as a total intake and cooling protection solution, this High-Flow Intake Elbow & EGR Delete Kit removes the restrictive factory throttle neck and failure-prone cooler assembly in a single upgrade. Featuring a smooth, wide-bore high-flow intake pipe paired with heavy-duty CNC block-off components, it eliminates internal coolant leak risks, stops power-robbing manifold contamination, and restores uninhibited charge-air velocity for maximum throttle response.
Key Features
- Cut from 6061 billet aluminum joined with high-grade stainless steel, sealed by premium high-temp O-rings that stay leak-free for life, even under heavy boost.
- Strips out the factory butterfly throttle valve to open fresh-air flow by up to 80%, delivering an instantly snappier throttle.
- Redirects hot exhaust away from the engine block, dropping EGTs and letting the whole cooling system run noticeably cooler.
- Arrives pre-tapped with a 1/8" NPT port and flush plug, ready to mount a boost gauge, water-methanol, or nitrous nozzle with zero drilling.
FAQ
Q: What sets this kit apart from the standard LMM EGR delete kit?
A: The standard kit only blanks off the EGR, leaving the restrictive stock elbow and its butterfly valve untouched. This High-Flow Kit swaps that entire bottleneck for a wide-open, mandrel-bent pipe, boosting airflow by roughly 80% for faster turbo spool-up and crisper throttle response.
Q: What is the purpose of the pre-tapped 1/8" NPT port on the intake elbow?
A: It serves as a built-in expansion point for easy future upgrades. You can mount an aftermarket boost gauge, water-methanol, or nitrous nozzle directly without drilling into the new aluminum elbow. If you don’t need it, simply leave the included flush plug tightened in place.
Q: What happens to the factory butterfly throttle valve electronics once this elbow is installed?
A: Because this elbow fully removes the factory butterfly valve, you simply unplug the electrical connector going to the factory valve actuator. Wrap the open truck-side harness plug with quality electrical tape or cover it with a heat-shrink cap to shield it from road debris, dust, and moisture.
Q: Will this high-flow elbow by itself lower EGTs, or do I also need to swap the downpipe?
A: The elbow drops EGTs by routing hot exhaust away from the engine, but the factory downpipe is still crushed into a restrictive “pancake” shape behind the turbo. Upgrading to a high-flow downpipe removes that final bottleneck—cutting EGTs by an extra 50°F to 100°F and speeding up turbo spool.
