Cummins - Turbocharger Gasket - 3921926
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The Cummins 3921926 Turbocharger Gasket is a genuine OEM Cummins sealing gasket used primarily on Tier 3 6.7 liter ISB/QSB engines. This gasket seals the turbocharger mounting connection and helps prevent exhaust leakage at the turbocharger flange, where high heat and pressure make proper sealing critical.
Key Features
- Genuine Cummins OEM turbocharger gasket
- Part number: 3921926
- Primary application: Tier 3 6.7L ISB/QSB engines
- Seals the turbocharger-to-manifold mounting surface
- Helps prevent exhaust leaks, soot tracking, and flange seepage
- Recommended replacement whenever the turbocharger is removed or resealed
Engine Compatibility
Used primarily on Cummins Tier 3 6.7 liter ISB/QSB diesel engines. Confirm fitment by engine serial number, CPL, turbocharger arrangement, and exhaust manifold configuration before ordering.
Serial Number Fitment Notice
Cummins turbocharger gasket fitment can vary by emissions tier, turbocharger model, manifold style, and engine arrangement. Always verify against the engine serial number or Cummins parts breakdown before installation.
When This Part Needs Replacement
Replace this gasket whenever the turbocharger is removed, replaced, or resealed. It should also be replaced if there is soot staining around the turbo flange, exhaust noise, visible leakage, or a burned/crushed gasket.
Installation Notes
Clean the turbocharger and manifold mating surfaces before installation. Inspect the flange faces, studs, nuts, and threads for damage or warping. Torque hardware evenly according to the Cummins service procedure.
Alternate/Superseded Part Numbers
- 3921926
Parts Desk Insight
This gasket should not be matched by shape alone. The important fitment detail is the Tier 3 6.7L ISB/QSB application, but serial-number verification is still the safest way to confirm the correct turbo and manifold arrangement.
Shipping: Ships same or next day for fast Canada wide shipping. ⚓
Shipping information
In-stock and OEM parts: ship same or next business day.
Locally warehoused items: ship within 3–4 business days.
Special-order items: timeline confirmed after order.
Returns & warranty
Returns & Satisfaction Guarantee
We stand firmly behind the quality of every product we sell. Your confidence matters to us — and we back it with a straightforward 30-Day Satisfaction Guarantee.
If you are not fully satisfied, you may request a return within 30 days of delivery. All returns must receive pre-approval prior to being sent back. Unauthorized returns will not be accepted.
To qualify for a return:
Item must be in new, unused condition
Product must be in its original packaging
All parts, components, hardware, manuals, and accessories must be included
Packaging must be undamaged and suitable for resale
Important:
Electronics are strictly inspected. No returns on open-box electronics. Exceptions may apply only with prior written approval. Any electronic unit that has been installed, powered, activated, or altered may not be eligible for return.
We are serious about product integrity — and equally serious about taking care of our customers. If there is ever a product issue, contact us immediately so we can make it right.
For return authorization, please contact our support team before shipping anything back.