Exhaust Manifold Kit
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Exhaust Manifold Kit Exhaust Manifold Kit
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Dorman - OE Solutions Exhaust Manifold Kit

Part No. 674-159 Warranty Details  

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More like a complete kit than a single part, many of our Exhaust Manifolds include gaskets and hardware for a complete installation. This part is a direct replacement.

Product Features:
  • Heat-shield may be included for protection of engine components where applicable
  • Cast iron or stainless tubular construction protects against warping or cracking
  • Leak-resistant for long-lasting performance
  • A rigorous quality inspection has been undertaken to ensure product standards
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Color:Unfinished
Compatibility:Left
Grade:Standard Replacement
Hardware Included:Yes
Inlet Port Shape:Square
Material:Cast Iron
Mounting Hole Quantity:2
Gasket Or Seal Included:Yes

REVIEW SNAPSHOT®

by PowerReviews
Dorman - OE SolutionsExhaust Manifold Kit
 
1.2

(based on 5 reviews)

Ratings Distribution

  • 5 Stars

     

    (0)

  • 4 Stars

     

    (0)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (1)

  • 1 Stars

     

    (4)

0%

of respondents would recommend this to a friend.

Pros

No Pros

Cons

  • Difficult to install (3)

Best Uses

No Best Uses

Reviewed by 5 customers

Displaying reviews 1-5

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1.0

Dorman 674-159 exhaust manifold on C3500

By 

from San Jose, CA

About Me Auto Enthusiast, Competitive Driver, DIY kinda guy

Pros

    Cons

    • Difficult To Install
    • Major mods req'd to fit

    Best Uses

    • A test of patience

    Comments about Dorman - OE Solutions Exhaust Manifold Kit:

    Other reviews have hit the nail on the head. My installation took 4 R 'n' R tries to locate the areas of interference to grind away the casting numbers on the engine-side of the main runner. The 2 areas were adjacent to protrusions on the head below exhaust ports 1 and 5. The holes for the A.I.R. tubes were also undersize. I found it's necessary to install the A.I.R. manifold after installing the exhaust manifold to avoid the A/C compressor and I had not checked the A.I.R. tubes for fit. Well, there was another R 'n' R to drill out the 4 holes. Bottom line: the manifold is of poor design/manufacturing. Shame on Dorman for not having this part made correctly! Additional note: the manifold I was replacing had the same casting numbers (unground) and was broken in 2 places and cracking at another. The previous mechanic had probably just slapped it on, thinking it was a direct-replacement part. Not!

     
    1.0

    total junk does not fit

    By 

    from chicago il

    About Me Mechanic

    Comments about Dorman - OE Solutions Exhaust Manifold Kit:

    total china junk

     
    1.0

    Consistently machined improperly

    By 

    from Atlanta area

    Verified Buyer

    Pros

    • Maybe price

    Cons

    • Very poor machining

    Best Uses

    • Replacement

    Comments about Dorman - OE Solutions Exhaust Manifold Kit:

    I ordered this manifold three times online & all three were defective & unusable. The problem was that the surface of the manifold that mates to the engine seems to have been machined down so far that the air pump recirculation bosses at each exhaust port were "exposed" &, IMHO, could have adversely affected & decreased the manifold to engine gasket seal area. Dorman is the mfr & I was surprised to see this lack of quality control.

    • Car & Truck:
    • Casual Driver, Professional mechanic

    (1 of 1 customers found this review helpful)

     
    1.0

    TOO DIFFICULT TO INSTALL

    By 

    from south jersey

    Verified Buyer

    Pros

      Cons

      • Difficult To Install
      • Unattractive Design

      Best Uses

        Comments about Dorman - OE Solutions Exhaust Manifold Kit:

        THE most ill fitting aftermarket part I have ever installed in a vehicle. Right down to the s.a.e. hardware with the metric threads cut into the casting. Dorman should be ashamed of themselves. My only regret is I have to give this item one star!!!

        • Car & Truck:
        • Auto Enthusiast, Mechanic, Truck Enthusiast

        (1 of 1 customers found this review helpful)

         
        2.0

        manifold had to be filed

        By 

        from rockmart ga

        See all my reviews

        Verified Buyer

        Pros

          Cons

          • Casting contacted block
          • Difficult To Install
          • Had to be filed to fit

          Best Uses

          • Replacement

          Comments about Dorman - OE Solutions Exhaust Manifold Kit:

          the manifold is at least 1/2 inch closer to the head and makes contact thats not seen.after installing i had an exhaust leak on the gasket because the raised numbers in the casting on the side against the head was contacting the head.i had to grind off the raised numbers and some on the head.the passenger side manifold fit with no problems.

          • Car & Truck:
          • Casual Driver, Mechanic

          Displaying reviews 1-5

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