Industrial 0986435504-R4 50% Injector | 2004.5-2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

Features:

• Increases fuel delivery by 50 percent
• Designed for extreme race applications
• Built for sled pulling competitions
• Delivers 34 liters per minute flow rate
• Precision calibrated for high-performance engines
• Direct fit for LLY Duramax trucks
• Supports high horsepower builds
• Sold individually for flexible replacement options
• Requires 8 units for full injector set
• Core charge refundable with usable core return
• Ideal for track and off-road use
• Engineered for durability under heavy loads

Push Your Duramax Past The Finish Line

If you're chasing serious power and want your LLY Duramax to dominate on race day or in the sled pull pit, the Industrial Injection 0986435504-R4 50% Injector is exactly what your build needs. This high-flow injector is designed to deliver 50 percent more fuel than stock, giving your truck the raw output it demands when things get competitive. Whether you're going full throttle down the strip or putting your setup to the test in a pulling competition, this injector delivers the fuel volume to keep power consistent and responsive under extreme stress. It's not just about numbers on a dyno—it’s about real-world performance that you can feel when the boost hits and the tires bite. With a flow rate of 34 liters per minute, it provides the breathing room needed for tuned or built engines to stretch their legs. If you want to complete your set, make sure you grab eight of these to cover all cylinders. It’s a serious upgrade for drivers who aren't interested in halfway builds.

Built To Fuel High Performance Demands

The Industrial 0986435504-R4 50% Injector offers a flow rate of 34 liters per minute, providing significantly more fuel to match the needs of modified Duramax engines. Precision-calibrated for race-level performance, each injector is engineered to handle the rigors of competition, including elevated boost levels, higher RPMs, and extended full-throttle runs. These injectors are a direct-fit solution for LLY 6.6L Duramax engines in 2004.5–2005 GM 2500HD and 3500HD models, making installation straightforward for experienced builders. A refundable core charge applies, provided the returned injector is in rebuildable condition, which supports long-term maintenance and affordability. Due to the high-output nature of these injectors, they are best paired with upgraded tuning, airflow enhancements, and a reinforced fuel system. Each unit is sold individually, allowing flexibility for customers replacing one or building a complete set from scratch. This is a competition-grade component crafted for those who demand consistent fuel delivery under the most intense conditions.

Fits: 2004.5, 2005 GM Silverado/Sierra 2500HD/3500HD 6.6L Duramax LLY

Notes:

• Designed for 2004.5–2005 LLY Duramax engines only
• Provides 50% more fuel flow than stock injectors
• Engineered for race and sled pull applications
• Not intended for everyday street driving or emissions compliance
• Sold individually—must purchase 8 for a complete set
• Core charge applies and is refundable upon return of a rebuildable core
• Requires supporting modifications such as custom tuning and upgraded fuel system
• Should be installed by professionals or experienced performance builders
• Part of Industrial Injection’s Race4 competition-grade injector series
• Not recommended for stock or lightly modified trucks