SPOOLOGIC Turbo Gasket Kit

The SPOOLOGIC SL-310-027 Turbo Gasket Kit supplies replacement sealing components for turbocharger service on 2017–2023 Chevrolet Silverado and GMC Sierra 6.6L Duramax L5P pickups. The kit includes the turbo mounting gasket, line and flange seals, and intake seals shown in the product photo.

Features

• Turbo mounting gasket matched to the listed application
• Seven small line and flange gaskets
• Two small round seals and a large exhaust sealing ring
• Includes the pictured intake and throttle-connection seals

Sealing and Service

Replacing the turbocharger requires opening several surrounding connections. Fresh gaskets and seals help restore these joints during reassembly. The turbo mounting gasket differs between the earlier and later L5P designs, so match the kit to the model year and installed hardware. Inspect each mating surface and confirm the original gasket profile before installation.

What's Included

• 1 Turbo Mounting Gasket
• 7 Small Line and Flange Gaskets in the Pictured Profiles
• 2 Small Round Seals
• 1 Large Round Exhaust Sealing Ring
• 1 Four-Bolt Intake/Throttle Flange Gasket
• 2 Rectangular Green Intake Seals
• 1 Round Green Intake Seal

Fitment

• 2017–2023 Chevrolet Silverado 2500 HD 3500 HD — 6.6L Duramax L5P
• 2017–2023 GMC Sierra 2500 HD 3500 HD — 6.6L Duramax L5P

Installation Notes

• Preparation: Clean the mating surfaces and keep debris out of open passages.
• Inspection: Repair damaged flanges, grooves, or lines before reassembly.
• Placement: Match each seal to its connection and keep it seated during assembly.
• Tightening: Follow the factory service procedure and torque specifications.
• Leak check: Inspect the serviced connections after installation.

OEM Cross-References

• GM: 12677294 — turbo mounting gasket
• GM: 12737099 — turbo oil-return pipe gasket
• GM: 12737100 — turbo oil-return pipe gasket

The references identify individual included gasket applications. They are not complete-kit part numbers.

1-Year Limited Warranty

This SPOOLOGIC gasket set carries a one-year limited warranty against defects in materials and workmanship from the original purchase date. Contact SPOOLOGIC for return authorization before sending the product for inspection. Approved defective gaskets will be replaced at SPOOLOGIC’s discretion. The customer is responsible for all warranty shipping charges. Damage from improper installation, incorrect application, contamination, or normal wear is not covered. Labor, removal, reinstallation, towing, and downtime are excluded, subject to applicable law. See the SPOOLOGIC Warranty Policy for complete terms.