SPOOLOGIC 3in Turbo Downpipe

The SPOOLOGIC 3-Inch Turbo Downpipe SL-520-020 replaces the turbo outlet-to-exhaust pipe on 2001–2004 Chevrolet Silverado 2500 3500 and GMC Sierra 2500 3500 pickups with the 6.6L Duramax LB7 engine. Its mandrel-bent tubing and fitted heat wrap suit the Federal-emissions LB7 turbo outlet flange.

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 upper mounting flange and lower clamp-style connection
• Black exterior finish
• Replacement upper flange gasket included

What’s Included

• 1 3-inch turbo downpipe — SL-520-020
• 1 Heat wrap — preinstalled
• Heat-wrap retaining clamps — preinstalled
• 1 Turbo Downpipe Gasket — SL-310-033

Fitment

• 2001-2004 Chevrolet Silverado GMC Sierra 2500 3500 6.6L Duramax LB7
• Federal emissions applications

Applications with the matching Federal-emissions turbo outlet configuration.

⚠️ Does not fit the 2002–2004 California-emissions LB7 turbo outlet configuration. For 2004 trucks, confirm the engine is an LB7; the later LLY uses SL-520-021. Match the installed flange configuration before ordering.

OEM Cross-References

• Turbo downpipe — GM: 97223168 / 97350391
• Turbo-to-downpipe gasket — GM: 97192619

OEM numbers are provided for identification only. This product contains SPOOLOGIC replacement parts.

⚠️ 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.