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1999 GMC P3500 Exhaust Manifold - Right 8 Cyl 7.4L Dorman

4 on 35 ratings
  • Features:
    • Ideal replacement - this exhaust manifold was precision-engineered and durably manufactured to match the fit and function of the stock manifold on specified vehicles
    • Reliable construction - durable materials resist warping, cracking and leaking for long-lasting performance
    • Complete repair - includes all necessary gaskets and downpipe hardware
    • Trustworthy design - built by industry leader in aftermarket manifolds
  • This exhaust manifold was precision-engineered and durably manufactured to match the fit and function of the original manifold on specified vehicles. It includes all necessary gaskets and downpipe hardware for a complete repair.
This Part Fits the Following OEM/Substitute Numbers:
101197, 10221960, 12553146

Additional Fitment Information:
Vehicle Block CC Position Engine Engine VIN CID
1999 GMC P3500 V - Right 8 Cyl 7.4L J 454
1 In Stock
Best Price:

$284.66 CAD
$341.59 CAD
Brand Dorman
Part # D18674-390
Condition New
Warehouse B
Dorman

P3500 Dorman Exhaust Manifold 674-390 1999 GMC
  • Exhaust Manifold Kit - Includes Required Gaskets And Hardware
    • Dorman Products is one of the most versatile, innovative and interesting manufacturers in the automotive aftermarket as their strength comes in providing the auto parts and equipment that you need, are hard to find, or otherwise previously known as "dealer only". Dorman specializes in the a lot of the basic parts and tools any mechanic or do-it-yourselfer needs, like screws and bolts of all styles and shapes, including specialty automotive parts. Dorman also focuses on providing original equipment replicated parts that strictly adhere to OEM specifications, but usually go to improve durability and/or performance by using better materials or enhancing design. For nearly 100 years Dorman has been filling the needs of the auto parts world.
    Featuring Dorman hydraulic brake hoses, parking brake cables, door mirrors and door handles, brake master cylinders, window motors and window regulators, control arm and ball joint assemblies, drum brake wheel cylinders, wheel lugs, disc brake hardware kits, cooling fans, intake and exhaust manifolds, fuel tanks, and so much more!

    General

    Heat Shield Included
    No
    Grade Type
    Regular
    Mounting Hardware Included
    Yes
    Package Contents
    Exhaust Manifold; 1 Manifold Gasket; 3 Studs; 3 Nuts
    Port Shape
    Square

    Packaging

    package quantity
    1
    weight
    18.67 lb
    Information on technical characteristics, the delivery set, the country of manufacture and the appearance of the goods is for reference only and is based on the latest information available at the time of publication.
    1. 23 Oct, 2018
      It seems to have worked
    2. Jig
      04 Apr, 2015
      Great Price compared to many, the heat shield is only place where I feel they cut corners on this exhaust manifold but I used it, cause I was worried using stock shield would just add another rattle to my 2010 Jeep Wrangler. Construction of it was nice, nothing to call home about, but an excellent stock replacement for the price and speed of delivery.Wasn't to hard to install on my 2010 Jeep Wrangler Sport 2dr, wear gloves(I should have and cut myself a few times in tight spaces), make sure you use a penetrating spray on bolts of old exhaust manifold a few hours before(Night before even better), you may try to loosen the old bolts and they can crack if they're too seized (engine space is tight as is you don't want to be trying to remove a bolt shank out of your engine as well). For jeep make sure you have a few extensions and at least one swivel/U-bolt socket. I used 2 swivels sockets and a very small cordless impact gun to limit torque, M12 Milwaukee to be exact, and...
    3. Ian Hanberg
      24 Mar, 2015
      Great product and great fit! Noticeably thicker material than the stock manifold.. fantastic buy
    4. HOFFA KHAN "TK"
      18 Feb, 2015
      Dorman always do very good job.Dorman always use OEM parts for replacements most parts are China made but they work good ,i been working on cars over 23 years and use Dorman Exhaust.Try it you and your car will be very happy.
    5. Evan W. Stender
      26 Dec, 2014
      Perfect fit for 2007 murano. Should also for any Nissan with the 3.5 v6. I had a cracked manifold so this was a neccasary fix. Took about 4 hours to swap out this manifold and the catalytic converter connected to it. I strongly urge anyone doing this to also replace the catalytic converter since they're conected and if the manifold is bad I garantee the cat is bad also.
    6. IRinka
      19 Dec, 2014
      It worked great
    7. Jason
      22 Nov, 2014
      Fit perfect. The only downside was the port casting was very uneven. I used a carbide burr to remove the extra material and match the port openings to the gasket. For the price, it was well worth the effort.
    8. Ranger Rick
      04 Nov, 2014
      I am not impressed. The casting does not look good. Looks worse than the OEM. If you're replacing these then you know where they crack and if you look at these castings you can see that they won't last very long either.
    9. Keith cutler
      27 Oct, 2014
      Great fit, although seen here with gaskets, mine did not come with them.
    10. Senozlu1
      22 Oct, 2014
      Manifold itself fits fine but heat shield never fit properly
    11. Tricia
      14 Oct, 2014
      Perfect fit and excellent price! This is the same brand that I was finding at my local parts stores but far cheaper here.
    12. Schurkey
      14 Oct, 2014
      I have installed this manifold, and warmed-up the engine. I have not driven the vehicle yet. Therefore I have no long-term assessment.1. The machining is very rough. Looks like it was planed by having Chinese people kick it across a concrete floor.2. The gasket flanges were 0.006--0.007 out-of-true from end-to-end.3. There was a casting void near one of the bolt holes. I don't think that will hurt, but it doesn't inspire confidence.If I'd had more time and was better-prepared, I'd have had this brand-new manifold re-surfaced at a local machine shop to correct the very poor surface finish, and the poor "flatness". That would have reduced the size of the casting void, too, but it would not have eliminated it.4. I had a lot of trouble getting the heat-shield to fit under the casting projections of the cylinder head. I had to bend the shield with pliers and a pry-bar to make it fit. The original heat shield is crimped...
    13. mike
      16 Sep, 2014
      I replaced the L side manifold for my 2004 Ford Crown Victoria P71. It fit great with no problems. I ordered the R side manifold & just finished the install today (9/16). No problem, perfect fit.
    14. michael palmer
      04 Sep, 2014
      great price and fit perfect
    15. Phil Benge
      13 Aug, 2014
      The manifold fit perfectly. That being said, I wasn't 100% happy with it. The casting looked a little sketchy in spots. I wouldn't be surprised if I'm changing this again in the next year. That nice pretty heat shield that comes with the manifold, yeah, worthless. It's to big. Keep the old one. Hopefully I'm wrong, and the only bad part about this whole deal is that the heat shield wouldn't fit.
    16. J. Harrison
      16 Jul, 2014
      Perfect fit!
    17. ZK6688
      28 May, 2014
      I replace with this part damaged exhaust manifold on 2003 xTerra without any problem. Little gasket was suspiciosly soft,and I prefer to use old one
    18. Peter C. Fitzgerald
      30 Mar, 2014
      I was ready to give up on my 2000 Tundra, but since these parts were available at a resonable price, I was able to fix it for much less!
    19. Peter C. Fitzgerald
      30 Mar, 2014
      I was ready to give up on my 2000 Tundra, but since these parts were available at a resonable price, I was able to fix it for much less!
    20. Dan Collins
      26 Dec, 2013
      This item came to us at a good price to fix a blown head gasket. The product was of high quality, but my girlfriend's PT Cruiser was not LOL.
    21. Dale J.
      04 Dec, 2013
      Great product great price this one is a winner half the price of any dealer fit well had no problems
    22. Jeremy Taylor
      07 Nov, 2013
      Product arrived well packaged, 2 days early (4 days using super saver free shipping), and came with gasket and hardware as described. The hardware simply means it comes with 2 replacement flange studs with nuts. The product bolted right on with no leaks and has been running great for a week so far. I give this product 5 stars since it is everything it says it is for a great price. Also it was identicle to the factory Mercury OEM part. Fantastic job Dorman and AutoPartsWAY!!!!!! One other thing, althought the gasket was included I read an instruction pamplet inside the box which informed me that the manufacturer does not recommend using the gasket. They are absolutely correct. No original gasket was in place so I did not use it. Still nice that they sent it in case.
    23. Rose Lambright
      02 Nov, 2013
      Manifold looks great comes with all gaskets for proper install,but turbo to manifold mounting hole is smaller than the original manifold. In my mind this restricts air flow which is critical to a diesel engine. I did call Dorman about this issue and was told by tech support that it was made known to their engineers, and were considering a redesign for it. Their engineers did say it would not have any adverse affect on the engine..
    24. Mack
      12 Oct, 2013
      This manifold turned out to be a "drop in" replacement for the cracked stock unit. It was a fairly simple install with just a little trouble retorquing the bolt closest to the firewall. I reused the stock heat shield which is nicer than the Dorman piece. The stud that holds it on is replaced by a bolt and nut that passes through the lip on the manifold. This is a better arrangement since the stud on the stocker tends to break off.I would suggest getting the Dorman 03413B bolt kit: to reduce the chance of bolt breakage.It can be a bit of a challenge getting to the flange bolts too. But I was able to tighten them from on top.
    25. Sokvann Sam
      12 Aug, 2013
      I love the item and excellent service. First, I received the item and some of the hardware are missing, I reported the new item was sent to me right away! Again, great service. Sokvann
    26. F. DeTiege "F. De Tiege"
      01 Aug, 2013
      I RECEIVED IT IN A TIMELY MANNER BUT IT IS STILL IN THE BOX. MY BROTHER IS GOING TO REPLACE IT FOR ME WHEN HE HAS TIME. I HOPE IT WORKS WELL.
    27. Corry Williams
      19 Jul, 2013
      I love it It was one of the best replacement on the 2000 kia Sportage .I had no dislikesIt came with new gasket top and bottom
    28. John Wayne Rules
      23 Apr, 2013
      The old manifold was a bear to remove, but this one bolted right up...I do wish it came with new studs but they were an easy find. It does say "Made in China" on these but they seem to be ok quality...
    29. AutoPartsWAY Customer
      03 Feb, 2013
      Item shiped on time. no damage to item. all nessary bolts nuts & gaskets with item. item fit on truck great
    30. Thomas
      25 Dec, 2012
      I purchased these manifolds to install on my 2001 F250 in conjunction with the new turbo up-pipe kit from international. There were no issues with fitment, the gaskets and/or hardware. I have had them on the vehicle for 2+ years without any issue. I painted the manifolds prior to installation. Purchase price from AutoPartsWAY was far better than the prices I was quoted from my local auto parts stores.No cons that I can identify.
    31. M. Phelps
      08 Dec, 2012
      Overall the product is well made. After seeing the supplied gasket set I decided to upgrade and purchase a Felpro set. This was not a fun install, took plenty of time and I had to drill out one broken stud. Not a DIY job!
    32. retrota79
      29 Oct, 2012
      not much really to say, it came as described, i put it on, no more exhaust fluff's. For the price i even work at a parts store and it was just as good of a deal buying it off here, works great so far no complaints, i would definitely recommend this to anyone .
    33. glandpuck
      10 Aug, 2012
      This is a complete kit including gaskets. Exact fit replacement to original manifold. Suggest you use ARP stainless steel bolts when attaching to block if you plan on keeping vehicle for a prolonged period of time.
    34. Alan
      10 Nov, 2011
      This manifold was a 100% perfect fit in our 2003 GMC S-10 Pickup. It was an easy installation and we were extremely pleased with the quality of the manifold. The shipping was fast and we received the package in perfect condition. All parts were included. We have a fleet of twenty vehicles and we are sick of paying high prices for parts. Thank you again
    35. Ivar
      28 Mar, 2010
      Product was good. Well worth the price and might be better than the original. Only problem I had was that the Heat shield have issues. You have to cut a piece off and bend it a little for the screw holes to line up. Other than that, we shall see if it holds up better than the Nissan original. I would have gave all 5 stars if it was not for me having to rework the heat shield.

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