MagnaFlow 3in Turbo Downpipe 2001-2004 GM 6.6L Duramax LB7 Stainless
This product is selected for proper fitment and compatibility with the listed engine application. Our team is available to assist with fitment questions, installation considerations, and supporting components to ensure a smooth install and reliable performance.
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The turbo downpipe is the first thing the exhaust sees after the turbocharger, and the factory piece on an LB7 is one of the more restrictive parts of the system. MagnaFlow's 15398 replaces it with 3in mandrel-bent stainless.
It uses the OE break locations, so it goes in without cutting the rest of the exhaust apart. Stainless construction means it will not rot out the way a coated steel pipe does in that heat.
Worth flagging: this part is sometimes advertised as a 4in pipe. MagnaFlow's own data says 3in. Year coverage is also listed as 2001-2005 by some retailers and 2001-2004 LB7 by diesel specialists.
Specs
- Fits: 2001-2004 GM 6.6L Duramax LB7
- Diameter: 3in
- Material: stainless steel
- Manufacturer Part Number: 15398
Shipping Height: 6.5
Shipping Length: 26.0
Shipping Width: 6.6