Air Intake Kit For 2004-2005 6.6L Duramax LLY GMC/Silverado 2500/3500 HD | SPELAB
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---tab Description---
SPELAB GMC Sierra/Chevy Silverado Cold Air Intake Kit w/Filter For 2004-2005 6.6L Duramax LLY 2500/3500 HD
A Cold Air Intake System positions the filter outside the engine compartment to ensure the coolest possible air inlet temperatures. Cooler air contains more oxygen, leading to a more powerful explosion in the combustion chamber, resulting in increased horsepower and torque. However, this is just one aspect of the power equation. Adjusting the length and diameter of the inlet pipe to harmonize with the engine's resonance helps push more air into the cylinders (consider your engine as a large air pump). This tuning enables the system to provide maximum power gains across the entire RPM range.
Features:
• Brand: SPELAB
• SKU: SPIS08759
• Color: Black Pipe | Red Filter
• Type: GMC Sierra/Chevy Silverado Cold Air Intake Kit
• Material: Black powder-coated aluminum alloy
• Sound: Provides intense, deep sporty sound
• Performance Boost: Improves throttle response, increases horsepower by 7-10%, and torque by 6-8%
• Filter: High-quality, washable, reusable cone air filter
• Installation: Easy to install with simple tools, no additional parts needed, all mounting accessories included
Vehicle
Fitment:
• 2004 Chevrolet Silverado 2500HD 6.6L V8 Turbo Diesel LLY Engine
• 2005 Chevrolet Silverado 2500HD 6.6L V8 Turbo Diesel LLY Engine
• 2004 Chevrolet Silverado 3500 6.6L V8 Turbo Diesel LLY Engine
• 2005 Chevrolet Silverado 3500 6.6L V8 Turbo Diesel LLY Engine
• 2004 GMC Sierra 2500HD 6.6L V8 Turbo Diesel LLY Engine
• 2005 GMC Sierra 2500HD 6.6L V8 Turbo Diesel LLY Engine
• 2004 GMC Sierra 3500 6.6L V8 Turbo Diesel LLY Engine
• 2005 GMC Sierra 3500 6.6L V8 Turbo Diesel LLY Engine
---tab FAQ---
COMMON FAQS
Q1. What a cold air intake does?
With a cold air intake, you can expect the following from your vehicle:
• Improved horsepower
• Improved acceleration
• Improved Sound
• Improved mileage
Q2. Does a cold air intake increase mpg?
A suitable amount of air is necessary for good and better combustion. More air can be used in a vehicle to increase horsepower. Therefore, cool air intake undoubtedly increases your car's MPG and aids in petrol savings. A cold air intake is consequently installed in your car to improve airflow and cool the combustion engine.
Q3. How much hp does a cold air intake add?
A cold air intake increases the amount of air that an engine can take in and resultantly the performance of engine upgrades. There is no direct number quantifying how much horsepower is added to the engine after this upgrade. But, this upgrade can provide a gain of around 5-20 hp. However, for turbocharged and supercharged engines the power gain is outstanding.
Q4: Does this intake include a heat shield? A4: Yes. The intake kit includes a custom black powder-coated heat shield that isolates the air filter from engine heat—clearly visible in the product photos—helping your LLY Duramax cold air intake pull in cooler, denser air.
Q5: Is the filter reusable, and how do I clean it? A5: Yes, the red cone air filter is washable and reusable . Simply spray it with a cleaning solution, rinse it under water, and let it dry fully. (Refer to image steps: spray → rinse → dry.) No need to replace it every oil change.
Q6: What parts are included in the 2005 Duramax air intake kit? A6: As shown in the unboxing photo, the kit includes:
Washable cone air filter
Black intake pipe with pre-drilled sensor ports
Heat shield with mounting bracket
Silicone couplers & clamps
Rubber trim and installation hardware Everything needed for your LLY cold air intake installation is included.
Q7: Do I need tuning after installing this intake? A7: No tuning is required. This intake is a bolt-on upgrade designed to work with the factory ECU. However, pairing it with a tuner can further improve performance on your 2004–2005 LLY Duramax .
Q8: Can I install this intake system myself? A8: Yes, the kit is designed for DIY-friendly installation using basic tools. If you follow the instructions and reference the parts shown in the photos, you can complete the upgrade in under an hour.
---tab Shipping & Returns---
---tab Video & Blogs---
Video
BEST BUDGET INTAKE FOR YOUR DURAMAX
Review and installation of the SPELAB cold air intake kit on an LLY Duramax. This video showcases the custom-painted white intake to match other engine bay components, the sound difference (specifically the turbo's surge sound), and the overall value of the kit as one of the best budget-friendly options for the LLY platform. Includes a shoutout for SPELAB's other diesel performance parts.
Installation Guide
×
---tab Description---
SPELAB GMC Sierra/Chevy Silverado Cold Air Intake Kit w/Filter For 2004-2005 6.6L Duramax LLY 2500/3500 HD
A Cold Air Intake System positions the filter outside the engine compartment to ensure the coolest possible air inlet temperatures. Cooler air contains more oxygen, leading to a more powerful explosion in the combustion chamber, resulting in increased horsepower and torque. However, this is just one aspect of the power equation. Adjusting the length and diameter of the inlet pipe to harmonize with the engine's resonance helps push more air into the cylinders (consider your engine as a large air pump). This tuning enables the system to provide maximum power gains across the entire RPM range.
Features:
• Brand: SPELAB
• SKU: SPIS08759
• Color: Black Pipe | Red Filter
• Type: GMC Sierra/Chevy Silverado Cold Air Intake Kit
• Material: Black powder-coated aluminum alloy
• Sound: Provides intense, deep sporty sound
• Performance Boost: Improves throttle response, increases horsepower by 7-10%, and torque by 6-8%
• Filter: High-quality, washable, reusable cone air filter
• Installation: Easy to install with simple tools, no additional parts needed, all mounting accessories included
Vehicle
Fitment:
• 2004 Chevrolet Silverado 2500HD 6.6L V8 Turbo Diesel LLY Engine
• 2005 Chevrolet Silverado 2500HD 6.6L V8 Turbo Diesel LLY Engine
• 2004 Chevrolet Silverado 3500 6.6L V8 Turbo Diesel LLY Engine
• 2005 Chevrolet Silverado 3500 6.6L V8 Turbo Diesel LLY Engine
• 2004 GMC Sierra 2500HD 6.6L V8 Turbo Diesel LLY Engine
• 2005 GMC Sierra 2500HD 6.6L V8 Turbo Diesel LLY Engine
• 2004 GMC Sierra 3500 6.6L V8 Turbo Diesel LLY Engine
• 2005 GMC Sierra 3500 6.6L V8 Turbo Diesel LLY Engine
---tab FAQ---
COMMON FAQS
Q1. What a cold air intake does?
With a cold air intake, you can expect the following from your vehicle:
• Improved horsepower
• Improved acceleration
• Improved Sound
• Improved mileage
Q2. Does a cold air intake increase mpg?
A suitable amount of air is necessary for good and better combustion. More air can be used in a vehicle to increase horsepower. Therefore, cool air intake undoubtedly increases your car's MPG and aids in petrol savings. A cold air intake is consequently installed in your car to improve airflow and cool the combustion engine.
Q3. How much hp does a cold air intake add?
A cold air intake increases the amount of air that an engine can take in and resultantly the performance of engine upgrades. There is no direct number quantifying how much horsepower is added to the engine after this upgrade. But, this upgrade can provide a gain of around 5-20 hp. However, for turbocharged and supercharged engines the power gain is outstanding.
Q4: Does this intake include a heat shield? A4: Yes. The intake kit includes a custom black powder-coated heat shield that isolates the air filter from engine heat—clearly visible in the product photos—helping your LLY Duramax cold air intake pull in cooler, denser air.
Q5: Is the filter reusable, and how do I clean it? A5: Yes, the red cone air filter is washable and reusable . Simply spray it with a cleaning solution, rinse it under water, and let it dry fully. (Refer to image steps: spray → rinse → dry.) No need to replace it every oil change.
Q6: What parts are included in the 2005 Duramax air intake kit? A6: As shown in the unboxing photo, the kit includes:
Washable cone air filter
Black intake pipe with pre-drilled sensor ports
Heat shield with mounting bracket
Silicone couplers & clamps
Rubber trim and installation hardware Everything needed for your LLY cold air intake installation is included.
Q7: Do I need tuning after installing this intake? A7: No tuning is required. This intake is a bolt-on upgrade designed to work with the factory ECU. However, pairing it with a tuner can further improve performance on your 2004–2005 LLY Duramax .
Q8: Can I install this intake system myself? A8: Yes, the kit is designed for DIY-friendly installation using basic tools. If you follow the instructions and reference the parts shown in the photos, you can complete the upgrade in under an hour.
---tab Shipping & Returns---
---tab Video & Blogs---
Video
BEST BUDGET INTAKE FOR YOUR DURAMAX
Review and installation of the SPELAB cold air intake kit on an LLY Duramax. This video showcases the custom-painted white intake to match other engine bay components, the sound difference (specifically the turbo's surge sound), and the overall value of the kit as one of the best budget-friendly options for the LLY platform. Includes a shoutout for SPELAB's other diesel performance parts.
Installation Guide
×
SPELAB Auto Parts: 1 year from delivery; supplier conditions apply. SPELAB offers a one-year limited warranty from delivery for material/workmanship defects under normal use, original purchaser only, with proof of purchase. Consumables, wear/cosmetic damage, improper installation, alteration, misuse and removal/installation labor are excluded. Approved remedies are repair, replacement or replacement parts at SPELAB’s discretion.
Return and warranty information is based on what SPELAB Auto Parts offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
SPELAB Auto Parts warranty policyView complete warrantyProduct conditions
Return and warranty information is based on what SPELAB Auto Parts offers. Product-specific eligibility and the supplier’s published conditions apply; FullSpecDiesel does not add or extend coverage.
- Return eligibility
- SPELAB allows return requests within 30 days of delivery, with authorization and undamaged goods, original packaging and accessories. Tuners are final sale. Customer pays voluntary return shipping; original shipping is not refunded. SPELAB pays return shipping for approved damaged, incorrect or manufacturing-defective items. Transit damage must be reported within two business days and incorrect items within seven days. Based on what SPELAB Auto Parts offers.
- Return window
- Not stated for this product; see supplier terms
- Restocking fee
- See supplier terms; no product-specific fee stated
- Return shipping
- Based on the supplier’s return policy; see terms
- Made to order
- No
- Backorder status
- Not backordered
- Cancellation
- Subject to supplier terms; contact FullSpecDiesel before requesting cancellation
- Warranty provider
- SPELAB Auto Parts
- Warranty duration
- 1 year from delivery; supplier conditions apply
- Compatibility
- Listed for specific vehicle configurations
- Legal use
- Street legal
- Processing estimate
- 3–10 business days supplier processing
- Shipping
- Shipping calculated at checkout
- Signature
- No signature requirement
- Supplier
- SPELAB Auto Parts
Product compatibility is based on the vehicle and product information provided. Review your selected truck, product options, measurements, modifications, and installation requirements before ordering.