Dorman 674-245 Exhaust Manifold - Right

Brand Dorman 674-245
Position Right
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 Springs; 3 Nuts
Port Shape Square
Fits Chevrolet and GMC · 216 vehicles

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

Cast iron construction. Durably manufactured for dependable exhaust service.

Complete repair kit. Includes gaskets and downpipe hardware for installation.

Cross-references ATP 101098, 651235 and 14031376 for the same application. See all 3.

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OE-Style Exhaust Manifold for GM Trucks and SUVs

Dorman 674-245 is a cast iron exhaust manifold engineered to match the fit and function of the original manifold on specified vehicles. It includes the gasket, heat shield, and downpipe hardware needed for a complete exhaust manifold repair on the right side.

Built for a direct replacement on select Chevrolet and GMC applications, this manifold supports a clean, factory-style repair for 1981-1986 Chevrolet C10, K10, K5 Blazer, and related GMC C/K trucks and Suburban models. The Dorman 674-245 part number is also listed for additional GM passenger and truck applications where the OE layout matches.

Key Features

  • Cast iron construction for durable exhaust service
  • Natural finish with square port shape
  • Includes gasket, heat shield, and mounting hardware
  • Precision-engineered to match original fit and function
  • Right-side exhaust manifold for specified GM vehicles
  • Package contents: exhaust manifold, manifold gasket, studs, springs, and nuts

Detailed Description

This Dorman exhaust manifold is designed as a direct replacement for the original right-side manifold on select Chevrolet and GMC vehicles. The cast iron design helps restore proper exhaust routing and sealing, while the included gasket and downpipe hardware support a complete repair. If you are replacing a cracked, warped, or leaking manifold on a Chevrolet C10, GMC K1500, or similar GM truck or SUV, part number 674-245 provides the OE-style layout needed for a proper service job.

This part cross-references ATP 101098 for the same application.

What It Helps Fix

  • Exhaust leaks at the manifold-to-cylinder head sealing surface
  • Broken or missing manifold studs and fasteners
  • Cracked or warped cast iron manifold housings
  • Noise from leaking exhaust on the right side of the engine
  • Failed downpipe connection hardware during manifold replacement

Fitment

  • Fits 1981-1986 Chevrolet C10, right
  • Fits 1985-1986 Chevrolet C10, right, Cast Iron
  • Fits 1981-1986 Chevrolet C10 Suburban, right
  • Fits 1985-1986 Chevrolet C10 Suburban, right, Cast Iron
  • Fits 1985-1986 Chevrolet C10 Suburban, right, 4 Holes
  • Fits 1981-1986 Chevrolet C20, right
  • Fits 1985-1986 Chevrolet C20, right, Cast Iron
  • Fits 1981-1986 Chevrolet C20 Suburban, right
  • Fits 1985-1986 Chevrolet C20 Suburban, right, Cast Iron
  • Fits 1985-1986 Chevrolet C20 Suburban, right, 4 Holes
  • Fits 1985-1986 Chevrolet C30, right, Cast Iron
  • Fits 1985-1986 Chevrolet Caprice, right
  • Fits 1981-1986 Chevrolet K10, right
  • Fits 1985-1986 Chevrolet K10, right, Cast Iron
  • Fits 1986 Chevrolet K10 Suburban, right
  • Fits 1981-1984 Chevrolet K10 Suburban, right
  • Fits 1985-1986 Chevrolet K10 Suburban, right, Cast Iron
  • Fits 1985-1986 Chevrolet K10 Suburban, right, 4 Holes
  • Fits 1985-1986 Chevrolet K20, right, Cast Iron
  • Fits 1981-1986 Chevrolet K20, right
  • Fits 1985-1986 Chevrolet K20 Suburban, right
  • Fits 1985-1986 Chevrolet K20 Suburban, right, Cast Iron
  • Fits 1985-1986 Chevrolet K20 Suburban, right, 4 Holes
  • Fits 1985-1986 Chevrolet K30, right, Cast Iron
  • Fits 1981-1986 Chevrolet K5 Blazer, right
  • Fits 1981-1986 GMC C1500, right
  • Fits 1985-1986 GMC C1500, right, Cast Iron
  • Fits 1981-1986 GMC C1500 Suburban, right
  • Fits 1985-1986 GMC C1500 Suburban, right, Cast Iron
  • Fits 1985-1986 GMC C1500 Suburban, right, 4 Holes
  • Fits 1981-1986 GMC C2500, right
  • Fits 1985-1986 GMC C2500, right, Cast Iron
  • Fits 1982-1986 GMC C2500 Suburban, right
  • Fits 1985-1986 GMC C2500 Suburban, right, Cast Iron
  • Fits 1985-1986 GMC C2500 Suburban, right, 4 Holes
  • Fits 1986 GMC C3500, right
  • Fits 1983-1984 GMC C3500, right
  • Fits 1985-1986 GMC C3500, right, Cast Iron
  • Fits 1981-1986 GMC Jimmy, right
  • Fits 1981-1986 GMC K1500, right
  • Fits 1985-1986 GMC K1500, right, Cast Iron
  • Fits 1985-1986 GMC K1500 Suburban, right, 4 Holes
  • Fits 1985-1986 GMC K2500, right, Cast Iron
  • Fits 1981-1986 GMC K2500, right
  • Fits 1985-1986 GMC K2500 Suburban, right, Cast Iron
  • Fits 1985-1986 GMC K3500, right, Cast Iron
  • Fits 1983-1985 Chevrolet Impala, right
  • Fits 1983-1985 Chevrolet K30, right
  • Fits 1983-1984 Chevrolet C30, right
  • Fits 1981-1984 GMC K1500 Suburban, right
  • Fits 1983-1984 GMC K3500, right

Installation Notes and Tips

Verify the original manifold shape, port layout, and right-side position before installation. Inspect the cylinder head sealing surface, replace damaged studs, and confirm the downpipe connection aligns correctly before tightening hardware. On vehicles with heat shielding or cast iron-specific fitment notes, match the existing configuration to the replacement part before assembly.

Quality Assurance

Dorman manufactures this manifold to match the fit and function of the original part on the listed vehicles. The cast iron construction, included gasket, heat shield, and hardware support a complete repair using OE-style dimensions and mounting points.

This part fits 216 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelLitersCylindersFuel TypePositionNotes
1986ChevroletC105.0LV8Right
1986ChevroletC105.7LV8RightCast Iron
1986ChevroletC105.7LV8Right
1986ChevroletC10 Suburban5.0LV8Right
1986ChevroletC10 Suburban5.7LV8RightCast Iron
1986ChevroletC10 Suburban5.7LV8Right4 Holes
1986ChevroletC205.0LV8Right
1986ChevroletC205.7LV8RightCast Iron
1986ChevroletC205.7LV8Right
1986ChevroletC20 Suburban5.0LV8Right
1986ChevroletC20 Suburban5.7LV8RightCast Iron
1986ChevroletC20 Suburban5.7LV8Right4 Holes
1986ChevroletC305.7LV8RightCast Iron
1986ChevroletCaprice5.7LV8GASRight
1986ChevroletK105.0LV8Right
1986ChevroletK105.7LV8RightCast Iron
1986ChevroletK10 Suburban5.0LV8Right
1986ChevroletK10 Suburban5.7LV8RightCast Iron
1986ChevroletK10 Suburban5.7LV8Right4 Holes
1986ChevroletK205.7LV8RightCast Iron
1986ChevroletK205.7LV8Right
1986ChevroletK20 Suburban5.0LV8Right
1986ChevroletK20 Suburban5.7LV8RightCast Iron
1986ChevroletK20 Suburban5.7LV8Right4 Holes
1986ChevroletK305.7LV8RightCast Iron
1986ChevroletK5 Blazer5.7LV8Right
1986ChevroletK5 Blazer5.0LV8Right
1986GMCC15005.0LV8Right
1986GMCC15005.7LV8RightCast Iron
1986GMCC15005.7LV8Right
1986GMCC1500 Suburban5.0LV8Right
1986GMCC1500 Suburban5.7LV8RightCast Iron
1986GMCC1500 Suburban5.7LV8Right4 Holes
1986GMCC25005.0LV8Right
1986GMCC25005.7LV8RightCast Iron
1986GMCC25005.7LV8Right
1986GMCC2500 Suburban5.0LV8Right
1986GMCC2500 Suburban5.7LV8RightCast Iron
1986GMCC2500 Suburban5.7LV8Right4 Holes
1986GMCC35005.0LV8Right
1986GMCC35005.7LV8RightCast Iron
1986GMCJimmyGASRight
1986GMCK15005.0LV8Right
1986GMCK15005.7LV8RightCast Iron
1986GMCK15005.7LV8Right
1986GMCK1500 Suburban5.7LV8Right4 Holes
1986GMCK25005.7LV8RightCast Iron
1986GMCK25005.7LV8Right
1986GMCK2500 Suburban5.7LV8RightCast Iron
1986GMCK35005.7LV8RightCast Iron
1985ChevroletC105.0LV8Right
1985ChevroletC105.7LV8RightCast Iron
1985ChevroletC105.7LV8Right
1985ChevroletC10 Suburban5.0LV8Right
1985ChevroletC10 Suburban5.7LV8RightCast Iron
1985ChevroletC10 Suburban5.7LV8Right4 Holes
1985ChevroletC205.0LV8Right
1985ChevroletC205.7LV8RightCast Iron
1985ChevroletC205.7LV8Right
1985ChevroletC20 Suburban5.0LV8Right
1985ChevroletC20 Suburban5.7LV8RightCast Iron
1985ChevroletC20 Suburban5.7LV8Right4 Holes
1985ChevroletC305.7LV8RightCast Iron
1985ChevroletCaprice5.7LV8GASRight
1985ChevroletImpala5.7LV8GASRight
1985ChevroletK105.0LV8Right
1985ChevroletK105.7LV8RightCast Iron
1985ChevroletK10 Suburban5.7LV8RightCast Iron
1985ChevroletK10 Suburban5.7LV8Right4 Holes
1985ChevroletK205.0LV8Right
1985ChevroletK205.7LV8RightCast Iron
1985ChevroletK205.7LV8Right
1985ChevroletK20 Suburban5.0LV8Right
1985ChevroletK20 Suburban5.7LV8RightCast Iron
1985ChevroletK20 Suburban5.7LV8Right4 Holes
1985ChevroletK305.7LV8RightCast Iron
1985ChevroletK305.7LV8Right
1985ChevroletK5 Blazer5.7LV8Right
1985ChevroletK5 Blazer5.0LV8Right
1985GMCC15005.0LV8Right
1985GMCC15005.7LV8RightCast Iron
1985GMCC15005.7LV8Right
1985GMCC1500 Suburban5.0LV8Right
1985GMCC1500 Suburban5.7LV8RightCast Iron
1985GMCC1500 Suburban5.7LV8Right4 Holes
1985GMCC25005.0LV8Right
1985GMCC25005.7LV8RightCast Iron
1985GMCC25005.7LV8Right
1985GMCC2500 Suburban5.0LV8Right
1985GMCC2500 Suburban5.7LV8RightCast Iron
1985GMCC2500 Suburban5.7LV8Right4 Holes
1985GMCC35005.7LV8RightCast Iron
1985GMCJimmyGASRight
1985GMCK15005.0LV8Right
1985GMCK15005.7LV8RightCast Iron
1985GMCK15005.7LV8Right
1985GMCK1500 Suburban5.7LV8Right4 Holes
1985GMCK25005.7LV8RightCast Iron
1985GMCK25005.7LV8Right
1985GMCK2500 Suburban5.7LV8RightCast Iron
1985GMCK35005.7LV8RightCast Iron
1984ChevroletC105.0LV8Right
1984ChevroletC105.7LV8Right
1984ChevroletC10 Suburban5.7LV8Right
1984ChevroletC10 Suburban5.0LV8Right
1984ChevroletC205.0LV8Right
1984ChevroletC205.7LV8Right
1984ChevroletC20 Suburban5.0LV8Right
1984ChevroletC305.7LV8Right
1984ChevroletImpala5.7LV8GASRight
1984ChevroletK105.0LV8Right
1984ChevroletK105.7LV8Right
1984ChevroletK10 Suburban5.7LV8Right
1984ChevroletK205.7LV8Right
1984ChevroletK305.7LV8Right
1984ChevroletK5 Blazer5.7LV8Right
1984ChevroletK5 Blazer5.0LV8Right
1984GMCC15005.0LV8Right
1984GMCC15005.7LV8Right
1984GMCC1500 Suburban5.7LV8Right
1984GMCC1500 Suburban5.0LV8Right
1984GMCC25005.0LV8Right
1984GMCC25005.7LV8Right
1984GMCC2500 Suburban5.0LV8Right
1984GMCC35005.7LV8Right
1984GMCJimmy5.7LV8Right
1984GMCJimmy5.0LV8Right
1984GMCK15005.0LV8Right
1984GMCK15005.7LV8Right
1984GMCK1500 Suburban5.7LV8Right
1984GMCK25005.7LV8Right
1984GMCK35005.7LV8Right
1983ChevroletC105.0LV8Right
1983ChevroletC105.7LV8Right
1983ChevroletC10 Suburban5.7LV8Right
1983ChevroletC10 Suburban5.0LV8Right
1983ChevroletC205.0LV8Right
1983ChevroletC205.7LV8Right
1983ChevroletC20 Suburban5.0LV8Right
1983ChevroletC305.7LV8Right
1983ChevroletImpala5.7LV8GASRight
1983ChevroletK105.0LV8Right
1983ChevroletK105.7LV8Right
1983ChevroletK10 Suburban5.7LV8Right
1983ChevroletK10 Suburban5.0LV8Right
1983ChevroletK205.7LV8Right
1983ChevroletK305.7LV8Right
1983ChevroletK5 Blazer5.7LV8Right
1983ChevroletK5 Blazer5.0LV8Right
1983GMCC15005.0LV8Right
1983GMCC15005.7LV8Right
1983GMCC1500 Suburban5.7LV8Right
1983GMCC1500 Suburban5.0LV8Right
1983GMCC25005.0LV8Right
1983GMCC25005.7LV8Right
1983GMCC2500 Suburban5.0LV8Right
1983GMCC35005.7LV8Right
1983GMCJimmy5.7LV8Right
1983GMCJimmy5.0LV8Right
1983GMCK15005.0LV8Right
1983GMCK15005.7LV8Right
1983GMCK1500 Suburban5.7LV8Right
1983GMCK25005.7LV8Right
1983GMCK35005.7LV8Right
1982ChevroletC105.0LV8Right
1982ChevroletC105.7LV8Right
1982ChevroletC10 Suburban5.7LV8Right
1982ChevroletC10 Suburban5.0LV8Right
1982ChevroletC205.0LV8Right
1982ChevroletC205.7LV8Right
1982ChevroletC20 Suburban5.0LV8Right
1982ChevroletK105.0LV8Right
1982ChevroletK105.7LV8Right
1982ChevroletK10 Suburban5.7LV8Right
1982ChevroletK205.7LV8Right
1982ChevroletK5 Blazer5.7LV8Right
1982ChevroletK5 Blazer5.0LV8Right
1982GMCC15005.0LV8Right
1982GMCC15005.7LV8Right
1982GMCC1500 Suburban5.7LV8Right
1982GMCC1500 Suburban5.0LV8Right
1982GMCC25005.0LV8Right
1982GMCC25005.7LV8Right
1982GMCC2500 Suburban5.0LV8Right
1982GMCJimmy5.7LV8Right
1982GMCJimmy5.0LV8Right
1982GMCK15005.0LV8Right
1982GMCK15005.7LV8Right
1982GMCK1500 Suburban5.7LV8Right
1982GMCK1500 Suburban5.0LV8Right
1982GMCK25005.7LV8Right
1981ChevroletC105.0LV8Right
1981ChevroletC10 Suburban5.7LV8Right
1981ChevroletC10 Suburban5.0LV8Right
1981ChevroletC205.0LV8Right
1981ChevroletC205.7LV8Right
1981ChevroletC20 Suburban5.0LV8Right
1981ChevroletK105.0LV8Right
1981ChevroletK105.7LV8Right
1981ChevroletK10 Suburban5.7LV8Right
1981ChevroletK10 Suburban5.0LV8Right
1981ChevroletK205.7LV8Right
1981ChevroletK5 Blazer5.7LV8Right
1981ChevroletK5 Blazer5.0LV8Right
1981GMCC15005.0LV8Right
1981GMCC15005.7LV8Right
1981GMCC1500 Suburban5.7LV8Right
1981GMCC1500 Suburban5.0LV8Right
1981GMCC25005.0LV8Right
1981GMCC25005.7LV8Right
1981GMCJimmy5.7LV8Right
1981GMCJimmy5.0LV8Right
1981GMCK15005.0LV8Right
1981GMCK15005.7LV8Right
1981GMCK1500 Suburban5.7LV8Right
1981GMCK25005.7LV8Right
Directly replaces or cross-references 3 part numbers
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
ATP — 10109865123514031376