
Overview
The GM Duramax LLY Y-Bridge Kit (2004.5-2005) is designed for 6.6L Duramax LLY diesel engines in compatible Chevrolet Silverado and GMC Sierra trucks. It replaces the factory intake bridge with a heavy-duty, high-flow assembly designed to address failures under boost and related drivability issues. The kit features aluminum intercooler piping, silicone couplers, and sealing components for a durable intake connection.
Vehicle Fitment
- Model Years: 2004.5-2005
- Makes: Chevrolet, GMC
- Models: Silverado 2500, Silverado 3500, Sierra 2500, Sierra 3500
- Engine: 6.6L Duramax LLY Diesel
- Body Style: Pickup
Key Features
- Heavy-Duty Construction: Designed for durability and extended service life.
- 3-Inch Aluminum Intercooler Pipe: Precision mandrel-bent piping provides a high-flow intake connection.
- Bead-Rolled Pipe Ends: Designed to help couplers maintain a secure seal.
- High-Flow Design: Promotes increased airflow and reduced turbulence to support engine performance.
- Heavy-Duty Spring Clamps: Included to secure the piping connections.
- 4-Ply Silicone Couplers: Provides durable connections between intake components.
- Gaskets and Seals Included: Supplied for installation.
- Silicone Heater Hoses: Included in the kit.
- EGR Compatibility: Not compatible with the factory EGR system.
- Temperature Considerations: Designed to support lower exhaust gas temperatures.
Installation Notes
Verify compatibility with your existing intake configuration before purchasing. This kit may not fit with many aftermarket intake systems. Race tuning is required for the intended application.
Note:
- For off-road use only.
- Race tuning is required.
- Not compatible with the factory EGR system.
- Will not fit with many aftermarket intake systems.
Shipping
Free shipping on tuners. We aim to dispatch in-stock orders within 2 business days. Most North American orders arrive within 2–7 business days after dispatch via expedited ground. International orders typically take 5–14 business days, depending on destination and customs.
Transit time starts when your order ships, not when you place it. Weekend orders are processed the next business day. Orders shipping outside Canada may be subject to import duties and taxes, which are the customer’s responsibility on delivery. See our shipping policy for full details.
Items Eligible for Return
These items can be returned within 30 days of the purchase date if they are unopened, unused, and in their original packaging:
- Tuning devices: an unopened, unused Mini Maxx V1/V2 or a blank EFI Live device.
- Cables and device accessories: an unopened, unused switch, bypass cable, universal pyrometer, or docking station.
Final Sale
The following items are final sale and cannot be returned:
- Custom tuning: additional tune files purchased separately, and custom tuning purchased with a device.
- Exhausts and race pipes: including downpipes purchased separately from an exhaust or race pipe.
- EGR kits.
Manufacturer Warranty
Every item we sell includes a 90-day manufacturer warranty. An item returned for a manufacturer defect can be refunded in full, exchanged, or replaced with a similar item of equal or lesser value.
Eligible items returned for any other reason follow the same options — a full refund, an exchange, or a replacement of equal or lesser value — as long as the item meets the requirements above.
Return Process
Every return must be approved before it is sent back. Email support@dynamicdiesels.com or call 1-877-600-5667 and we’ll issue a valid Return Merchandise Authorization (RMA) number and a prepaid return label.
Do not send anything back without an approved RMA and the return label we provide. Returns sent without both will not be accepted or processed. See our refund policy for full details.
Warranty
All tuning devices come with a 90-day manufacturer’s warranty from the date of delivery. You have a full 90 days from delivery to start a warranty claim if an issue arises. We also honor all applicable manufacturer warranties on the products we sell; coverage period and claim process vary by brand and product category.
To start a claim, email support@dynamicdiesels.com or call 1-877-600-5667 with your order number. We may ask a few questions about the device to confirm the fault, and we may request proof of communication with the manufacturer, as they are often the primary contact for device issues.
Once your claim is approved, you can choose one of the following:
- Return for replacement: Send us the faulty device, and once we receive it we’ll dispatch a replacement of the same or a similar device of equal or lesser value.
- Return for refund: Return the faulty device and we’ll refund the original payment method. Please allow 3–4 business days for the refund to appear.
- Return for gift card: Receive a gift card for the faulty device, sent to the email on file and available to use right away.
You’ll receive a Return Merchandise Authorization (RMA) number and a prepaid return label to send the faulty device back. See our refund policy for full details.
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