SPOOLOGIC 3in Turbo Downpipe

The SPOOLOGIC 3-Inch Turbo Downpipe SL-520-021 replaces the turbo outlet-to-exhaust pipe on 2004.5–2010 Chevrolet Silverado 2500 3500 and GMC Sierra 2500 3500 pickups with the 6.6L Duramax LLY LBZ LMM engines. Its mandrel-bent tubing and fitted heat wrap suit the LLY LBZ LMM turbo outlet and original downpipe mounting location.

Features

• 3-inch mandrel-bent tubing provides a smooth exhaust flow path
• Designed to reduce restriction after the turbocharger
• Preinstalled heat wrap helps limit radiant heat transfer
• Welded V-band-style connection flanges
• Integrated mounting bracket supports the installed pipe
• Connects in the original downpipe location

What’s Included

• 1 3-inch turbo downpipe with welded flanges and mounting bracket — SL-520-021
• 1 Heat wrap — preinstalled
• Heat-wrap retaining clamps — preinstalled

Fitment

• 2004.5-2005 Chevrolet Silverado GMC Sierra 2500 3500 6.6L Duramax LLY
• 2006 Chevrolet Silverado GMC Sierra 2500 3500 6.6L Duramax LLY
• 2006-2007 Chevrolet Silverado GMC Sierra 2500 3500 6.6L Duramax LBZ
• 2007.5-2010 Chevrolet Silverado GMC Sierra 2500 3500 6.6L Duramax LMM

Includes the 2007 Classic LBZ and 2007.5 new-body LMM pickup configurations. For 2004 trucks, confirm the engine is an LLY; the earlier LB7 uses a different turbo outlet and downpipe.

OEM Cross-References

• Turbo downpipe — GM: 98050150

OEM numbers are provided for identification only. This is a SPOOLOGIC replacement part.

⚠️ Emissions Notice

Not CARB approved. Not legal for sale or use in the state of California.

1-Year Limited Warranty

Every SPOOLOGIC 3in Turbo Downpipe carries a 1-Year Limited Warranty against defects in materials and workmanship for the original purchaser from the original purchase date. Coverage excludes damage caused by improper installation, unsupported or misaligned connections, or physical damage. Normal heat discoloration is not covered. Claims require dated proof of purchase. Contact SPOOLOGIC for return authorization before shipping the component for inspection. If inspection confirms a covered defect, SPOOLOGIC will replace the covered component. Customers pay warranty shipping in both directions; labor and related costs are not covered. See the SPOOLOGIC Warranty Policy for full terms.