2017-2023 Duramax L5P 3.5" L5P Downpipe (L5P-EXH-A004)
If you're building an L5P Duramax, one of the first upgrades you require is the upgraded 3.5" L5P Downpipe. From the factory, the L5P comes with an extremely restrictive crushed downpipe that does nothing but raise your EGT's and rob you of power.
Does Not Include Bungs for Sensors - Offroad Competition Use Only! Race Tuning Required to Run Downpipe. We recommend adding the EGR Upgrade Kit with this downpipe. It includes everything you need to fix your OEM EGR before it starts causing you problems and costing you money.
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)
Express Shipping (1-2 business days)
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.
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.
