2004.5-2005 Duramax LLY HSP Max Flow Bridge to Factory Cold Side (206-HSP)
The 206-HSP HSP Max Flow Bridge to Factory Cold Side is a bolt-on LLY Y-bridge upgrade for 2004.5–2005 Chevrolet and GMC Duramax trucks. This LLY Duramax Y-bridge kit is designed to increase airflow and reduce boost leaks while retaining compatibility with the OEM factory cold side tube.
Why Upgrade to an LLY Y-Bridge?
The factory bridge on the 2004.5–2005 LLY Duramax can become a restriction as airflow demand increases. An upgraded Y bridge for LLY Duramax improves flow to support better throttle response and turbo spool-up, while also addressing common sealing issues that can lead to boost leaks.
What Makes the HSP Y Bridge for LLY Duramax Different?
HSP designed this LLY Y bridge as a 3-inch precision-cast and CNC-machined two-piece bridge that connects to the stock cold side system. The two-piece construction helps simplify installation, improves sealing, and delivers a noticeable airflow improvement compared to the OEM bridge setup.
Order Processing Time:
Orders are typically processed within 24-48 hours after the order has been placed.
Custom or special order items may take longer to process, typically 3-5 business days depending on the product and customization required.
Shipping Methods:
Standard Shipping (3-7 business days - location dependent)
Express Shipping (1-2 business days- location dependent)
Packaging:
All parts are securely packaged to better prevent any damage during transit. Fragile or high-value parts will be packaged with additional protective materials, such as bubble wrap or foam padding.
Shipping Rates:
Shipping rates vary based on the size, weight, and destination of the package. You can view the estimated shipping costs for your order during the checkout process before placing your order.
Order Tracking:
Once your order has been shipped, you will receive an email with the tracking number and carrier information. You can also track your order status by logging into your OCDiesel account.
USA Shipping:
We ship to the USA! (Except California) Please note that USA shipping rates and delivery times may vary based on destination. Customers are responsible for any customs fees, import taxes, or additional charges that may apply.
Not all products are stocked in-house. To ensure you receive your desired items promptly, please check for availability before placing your order. Some products may be backordered due to high demand or supply chain constraints, which could result in longer delivery times.
We strive to keep our inventory updated regularly, but availability can change quickly. For the most accurate information, contact the OCDiesel customer service team using either this link, or the chat bubble on the bottom right of this page.
Most items are eligible for return within 30 days of shipping, provided they are unused, in original manufacturer packaging, and in resalable condition. All returns & cancellations are subject to restocking and cancellation fees.
Returns must include a Return Authorization Number (RA #) and be shipped with tracking. Return shipping costs are the responsibility of the customer.
Custom/special orders, electronics, and digital goods are final sale—no returns, refunds, or exchanges.
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