HomeExhaust > Gaskets and Sealing SystemsApex AMS3291 Exhaust Manifold Gasket Set
Part #: AMS3291

Apex AMS3291 Exhaust Manifold Gasket Set

⚙️ 27 vehicles fit this part
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OE Direct Replacement — Bolt-on fit, no modifications needed
🚗Fitment: Buick, Chevrolet, GMC, Isuzu, Oldsmobile, and Saab, 9-7x, Ascender, Bravada, Envoy, Envoy XL, Envoy XUV, Rainier, Trailblazer, and Trailblazer EXT
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Apex AMS3291 Exhaust Manifold Gasket Set

The Apex AMS3291 exhaust manifold gasket set is a direct-fit sealing solution for selected GM and Isuzu SUVs from 2002-2005. It is built for applications where a secure exhaust seal is needed between the exhaust manifold and cylinder head.

Key Features

  • Exhaust manifold gasket set for manifold-to-head sealing
  • Fits 2002-2005 Chevrolet Trailblazer and Trailblazer EXT
  • Fits 2002-2005 GMC Envoy, 2002-2005 GMC Envoy XL, and 2004-2005 GMC Envoy XUV
  • Fits 2004-2005 Buick Rainier, 2003-2005 Isuzu Ascender, 2005 Saab 9-7x, and 2002-2004 Oldsmobile Bravada
  • Part number AMS3291 for catalog and fitment verification

Detailed Description

Use the Apex AMS3291 when replacing a leaking or damaged exhaust manifold gasket on compatible Chevrolet Trailblazer, GMC Envoy, Buick Rainier, Isuzu Ascender, Saab 9-7x, or Oldsmobile Bravada applications. This gasket set is intended to restore the seal at the exhaust manifold, helping maintain proper exhaust routing and reducing the chance of leakage at the cylinder head interface. If you are searching for an exhaust manifold gasket set for 2002-2005 Chevrolet Trailblazer or 2002-2005 GMC Envoy applications, AMS3291 is the part number to reference.

What It Helps Address

  • Exhaust leaks at the manifold-to-head joint
  • Ticking or puffing noises from a leaking manifold seal
  • Loss of sealing after manifold service or replacement
  • Visible soot around the exhaust manifold area
  • Failed gasket material from heat cycling

Installation Notes and Tips

Confirm engine and vehicle fitment before installation, since this part is listed by year, make, and model only. Clean the mating surfaces thoroughly and inspect the exhaust manifold and fasteners for warpage, cracks, or damage before installing the new gasket set. Follow the vehicle service procedure and torque sequence specified for the application.

Quality Assurance

Apex AMS3291 is cataloged as an exhaust manifold gasket set for the listed applications and should be matched to the vehicle by fitment data before purchase. This part cross-references Monroe Shocks & Struts (e.g., 172286, 182286) for the same application.

This part fits 27 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2005BuickRainier4.2LL6N/A
2005ChevroletTrailblazer4.2LL6N/A
2005ChevroletTrailblazer EXT4.2LL6N/A
2005GMCEnvoy4.2LL6N/A
2005GMCEnvoy XL4.2LL6N/A
2005GMCEnvoy XUV4.2LL6N/A
2005IsuzuAscender4.2LL6N/A
2005Saab9-7x4.2LL6N/A
2004BuickRainier4.2LL6N/A
2004ChevroletTrailblazer4.2LL6N/A
2004ChevroletTrailblazer EXT4.2LL6N/A
2004GMCEnvoy4.2LL6N/A
2004GMCEnvoy XL4.2LL6N/A
2004GMCEnvoy XUV4.2LL6N/A
2004IsuzuAscender4.2LL6N/A
2004OldsmobileBravada4.2LL6N/A
2003ChevroletTrailblazer4.2LL6N/A
2003ChevroletTrailblazer EXT4.2LL6N/A
2003GMCEnvoy4.2LL6N/A
2003GMCEnvoy XL4.2LL6N/A
2003IsuzuAscender4.2LL6N/A
2003OldsmobileBravada4.2LL6N/A
2002ChevroletTrailblazer4.2LL6N/A
2002ChevroletTrailblazer EXT4.2LL6N/A
2002GMCEnvoy4.2LL6N/A
2002GMCEnvoy XL4.2LL6N/A
2002OldsmobileBravada4.2LL6N/A

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.