Dorman 674-391 Exhaust Manifold - Left
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Dorman

Dorman 674-391 Exhaust Manifold - Left

Brand Dorman 674-391
Position Left
Color Natural
Gasket Or Seal Included Yes
Grade Type Regular
Heat Shield Included Yes
Material Cast Iron
Mounting Hardware Included Yes
Package Contents Exhaust Manifold; 1 Manifold Gasket; 3 Studs; 3 Nuts
Port Shape Square
Fits Chevrolet and GMC · 70 vehicles

OE direct replacement. Precision-engineered for the original manifold's fit and function.

Cast iron construction. Durably manufactured for dependable exhaust service.

Complete repair kit. Includes gaskets, heat shield, and mounting hardware.

Cross-references ATP 101179, 10230859 and SK674391 for the same application. See all 3.

$145.55Free shipping
In stock · usually ships same day before 1pm CST
Step 1 — Confirm fitment
Free return shipping if it doesn't fit when you check fitment here first.

Select your vehicle to confirm fitment
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Step 2 — Quantity
Order total $145.55
Free shipping to the continental U.S.
Free returns within 60 days if it doesn't fit when fitment is verified.
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Dorman 674-391 Exhaust Manifold

This Dorman exhaust manifold is precision-engineered to match the fit and function of the original part on specified vehicles. Built from cast iron with a natural finish, it includes the gasket and heat shield needed for a complete repair on the left side.

  • Cast iron construction for durable exhaust service
  • Natural finish with square port shape
  • Includes gasket, heat shield, and mounting hardware
  • Direct replacement for the original manifold on listed applications
  • Part number: 674-391

Vehicle Fitment

  • Fits 1996-2000 Chevrolet C2500, left
  • Fits 1996-2000 Chevrolet C3500, left
  • Fits 1996-2000 Chevrolet Express 3500, left
  • Fits 1996-2000 Chevrolet K2500, left
  • Fits 1996-2000 Chevrolet K3500, left
  • Fits 1996-2000 GMC C2500, left
  • Fits 1996-2000 GMC C3500, left
  • Fits 1996-2000 GMC K2500, left
  • Fits 1996-2000 GMC K3500, left
  • Fits 1996-2000 GMC Savana 3500, left
  • Fits 1996-1999 Chevrolet C2500 Suburban, left
  • Fits 1996-1999 Chevrolet K2500 Suburban, left
  • Fits 1996-1999 Chevrolet P30, left
  • Fits 1996-1999 GMC C2500 Suburban, left
  • Fits 1996-1999 GMC K2500 Suburban, left

Common Repair Uses

  • Cracked or warped exhaust manifold replacement
  • Exhaust leaks at the manifold-to-cylinder-head sealing surface
  • Broken or missing manifold mounting hardware
  • Heat shield damage on the left exhaust side
  • Failed gasket sealing during exhaust repair

Installation Notes

Verify left-side application before installation and compare the port shape, mounting points, and included gasket against the removed part. Clean the cylinder-head sealing surface thoroughly and inspect the downpipe connection and studs for wear before assembly. This part cross-references ATP 101179 for the same application.

Quality Assurance

Dorman manufactures this manifold as a direct-fit replacement for specified Chevrolet and GMC applications, with materials and dimensions selected to match original fit and function. Part number 674-391 is built for regular-duty service and supplied with the components needed for a complete exhaust manifold repair.

This part fits 70 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersPositionNotes
2000ChevroletC25007.4LV8Left—
2000ChevroletC35007.4LV8Left—
2000ChevroletExpress 35007.4LV8Left—
2000ChevroletK25007.4LV8Left—
2000ChevroletK35007.4LV8Left—
2000GMCC25007.4LV8Left—
2000GMCC35007.4LV8Left—
2000GMCK25007.4LV8Left—
2000GMCK35007.4LV8Left—
2000GMCSavana 35007.4LV8Left—
1999ChevroletC25007.4LV8Left—
1999ChevroletC2500 Suburban7.4LV8Left—
1999ChevroletC35007.4LV8Left—
1999ChevroletExpress 35007.4LV8Left—
1999ChevroletK25007.4LV8Left—
1999ChevroletK2500 Suburban7.4LV8Left—
1999ChevroletK35007.4LV8Left—
1999ChevroletP307.4LV8Left—
1999GMCC25007.4LV8Left—
1999GMCC2500 Suburban7.4LV8Left—
1999GMCC35007.4LV8Left—
1999GMCK25007.4LV8Left—
1999GMCK2500 Suburban7.4LV8Left—
1999GMCK35007.4LV8Left—
1999GMCSavana 35007.4LV8Left—
1998ChevroletC25007.4LV8Left—
1998ChevroletC2500 Suburban7.4LV8Left—
1998ChevroletC35007.4LV8Left—
1998ChevroletExpress 35007.4LV8Left—
1998ChevroletK25007.4LV8Left—
1998ChevroletK2500 Suburban7.4LV8Left—
1998ChevroletK35007.4LV8Left—
1998ChevroletP307.4LV8Left—
1998GMCC25007.4LV8Left—
1998GMCC2500 Suburban7.4LV8Left—
1998GMCC35007.4LV8Left—
1998GMCK25007.4LV8Left—
1998GMCK2500 Suburban7.4LV8Left—
1998GMCK35007.4LV8Left—
1998GMCSavana 35007.4LV8Left—
1997ChevroletC25007.4LV8Left—
1997ChevroletC2500 Suburban7.4LV8Left—
1997ChevroletC35007.4LV8Left—
1997ChevroletExpress 35007.4LV8Left—
1997ChevroletK25007.4LV8Left—
1997ChevroletK2500 Suburban7.4LV8Left—
1997ChevroletK35007.4LV8Left—
1997ChevroletP307.4LV8Left—
1997GMCC25007.4LV8Left—
1997GMCC2500 Suburban7.4LV8Left—
1997GMCC35007.4LV8Left—
1997GMCK25007.4LV8Left—
1997GMCK2500 Suburban7.4LV8Left—
1997GMCK35007.4LV8Left—
1997GMCSavana 35007.4LV8Left—
1996ChevroletC25007.4LV8Left—
1996ChevroletC2500 Suburban7.4LV8Left—
1996ChevroletC35007.4LV8Left—
1996ChevroletExpress 35007.4LV8Left—
1996ChevroletK25007.4LV8Left—
1996ChevroletK2500 Suburban7.4LV8Left—
1996ChevroletK35007.4LV8Left—
1996ChevroletP307.4LV8Left—
1996GMCC25007.4LV8Left—
1996GMCC2500 Suburban7.4LV8Left—
1996GMCC35007.4LV8Left—
1996GMCK25007.4LV8Left—
1996GMCK2500 Suburban7.4LV8Left—
1996GMCK35007.4LV8Left—
1996GMCSavana 35007.4LV8Left—
Directly replaces or cross-references 3 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
ATP — 10117910230859SK674391