Looking to increase your horsepower and torque? Check out the K&N 21-3101 Boost Control Module. This easy-to-install module provides more efficient air flow for your LLY Duramax 2004.5-2005, resulting in increased horsepower and torque. Plus, it comes with a Million Mile Limited Warranty, so you can be confident in its performance. Don't wait, order your K&N 21-3101 Boost Control Module today!
• Increased horsepower and torque
• More efficient air flow
• Easy to install with no drilling or modification required
• Million Mile Limited Warranty