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SKU: MMBK-DMAX-04BK | UPC: 748666003897
Mishimoto 2004.5-2005 Chevrolet GMC 6.6L Duramax LLY Silicone Boot Kit
Replace brittle factory plastic boots with the Mishimoto silicone boot kit designed for 2004.5-2005 Chevrolet Silverado 2500HD 3500 and GMC Sierra 2500HD 3500 equipped with 6.6L Duramax LLY diesel and Allison 1000 4L80-E NV4500 or S6-650 transmissions. This direct-fit kit seals turbocharger-to-intercooler and intake connections to stop boost leaks and deliver reliable high-pressure airflow for better throttle response and power. Each boot uses 4-ply 5mm-thick reinforced silicone rated to 300 PSI for long-term durability under extreme boost and heat.
Key Features
- 4-Ply Reinforced Silicone: 5mm wall thickness with DuraCore aramid fiber lining resists cracking tearing and punctures far beyond OEM plastic even at 500°F+ EGTs
- Complete Replacement Kit: Four precision-molded boots plus eight T-bolt clamps cover all turbo outlet intercooler inlet outlet and intake tube connections
- Direct OEM Fitment: Matches factory routing and dimensions for 2004.5-2005 LLY Duramax no modifications trimming or adjustments needed
- Leak-Proof Performance: Eliminates common boost leaks that rob horsepower improves turbo spool and spool efficiency for noticeable gains
- Black Silicone Finish: Factory-style look integrates seamlessly under the hood while outperforming stock in heat oil and pressure resistance
Product Notes
- Confirm your truck has 2004.5-2005 6.6L Duramax LLY engine and listed transmission for proper fit
- Lifetime warranty covers defects in materials and craftsmanship
- Ships in protective Mishimoto packaging to prevent damage
Installation Notes
- Professional installation recommended.
- Remove OEM boots and clamps torque new T-bolt clamps to 6-8 Nm for secure seal
- Uses stock mounting locations and hardware no additional parts required
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2004-2005 | Chevrolet | Silverado 2500 HD | Base |
| 2004-2005 | Chevrolet | Silverado 2500 HD | LS |
| 2004-2005 | Chevrolet | Silverado 2500 HD | LT |
| 2004-2005 | Chevrolet | Silverado 2500 HD | WT |
| 2004-2005 | Chevrolet | Silverado 3500 | Base |
| 2004-2005 | Chevrolet | Silverado 3500 | LS |
| 2004-2005 | Chevrolet | Silverado 3500 | LT |
| 2004 | Chevrolet | Silverado 3500 | WT |
| 2004-2005 | GMC | Sierra 2500 HD | Base |
| 2004-2005 | GMC | Sierra 2500 HD | SLE |
| 2004-2005 | GMC | Sierra 2500 HD | SLT |
| 2004-2005 | GMC | Sierra 2500 HD | WT |
| 2004-2005 | GMC | Sierra 3500 | Base |
| 2004-2005 | GMC | Sierra 3500 | SLE |
| 2004-2005 | GMC | Sierra 3500 | SLT |
| 2004-2005 | GMC | Sierra 3500 | WT |
Why Choose Mishimoto?
- Proven track record in motorsports and street performance applications
- Every part dyno-tested and validated on real vehicles
- Engineered with precision molds for exact fit and peak performance
Frequently Asked Questions
-
Q: Will this kit fit 2004 Duramax trucks without the 0.5 designation?
A: Designed specifically for 2004.5-2005 LLY models verify your VIN or ECM code as early 2004 LB7 uses different routing -
Q: What material are the boots made from?
A: High-grade 4-ply silicone with internal aramid reinforcement rated for 300 PSI and extreme heat resistance -
Q: Does installation require special tools or tuning?
A: No tuning needed uses provided T-bolt clamps and basic hand tools 1-2 hours for experienced installers
Shipping & Handling
- Method: UPS Ground
- Availability: In stock - ships same or next business day
- Packaging: Mishimoto branded box 12 x 8.5 x 6 inches
- Weight: 2.2 lbs
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Looks pretty nice
Looks pretty nice, pricing was good and the reinforcement is a big plus.
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I emailed customer service to inquire about when it would be shipped
I emailed customer service to inquire about when it would be shipped. They checked and emailed me with the answer. Customer service is A1
Ralph J.
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Installation was easy
Installation was easy. The price is good and it looks great on the truck.
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