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Dorman 674-685 Exhaust Manifold Kit

Curated from 74 real Reddit conversations

Refreshed on: October 22, 2024

Dorman 674-685 Exhaust Manifold Kit

Brand: Dorman

Price: $84

Snoop Score:

6.0

Sentiment

6.9

Popularity

5.9

Technical

5.7

Buy on Amazon for $84 See All Exhaust Manifold Reviews

As an Amazon Associate, I earn from qualifying purchases.

Snoop's Take

The Dorman 674-685 Passenger Side Exhaust Manifold Kit is designed to replace the stock manifold in select Ram models. This kit not only includes the manifold but also comes with all necessary gaskets and downpipe hardware for a complete repair solution. Consumer feedback has highlighted several strengths of this product, with many users noting its cost-effectiveness compared to OEM parts. One user mentioned, "Dorman is just as good as OEM, and is roughly third of a price," while others appreciate the visual similarity to OEM components. However, some concerns were raised regarding reliability and fit, particularly for certain vehicle models, as indicated by a review mentioning, "there are some scary reviews on Amazon - specifically for the earlier years." Overall, the Dorman 674-685 Exhaust Manifold Kit is recommended for those seeking an affordable and visually compatible replacement. While there are mixed reviews regarding quality and fit, many users find it to be a reliable option for exhaust repairs, especially for its price point.

Not for you? Check out our other rated Exhaust Manifold

Honestly, unless they're pretty experienced with these sorts of repairs already, just go with the Dorman clamps mentioned.
Positive Feedback

Dorman is typically better than oem.
Negative Feedback

6.0

Dorman 674-685 Exhaust Manifold Kit

Buy on Amazon for $84

Performance Enhancement

6 / 10

Aftermarket Replacements

6 / 10

Custom Repair Projects

6 / 10

Routine Maintenance

6 / 10

See how this compares to all Exhaust Manifold

What it does well!

Key strengths users can’t stop talking about.

Dorman clamps are helpful for exhaust repairs

“Honestly, unless they're pretty experienced with these sorts of repairs already, just go with the Dorman clamps mentioned.”➕

Cost-effective compared to OEM parts

“Dorman is just as good as OEM, and is roughly third of a price.”➕

“Dorman should say if they are approved in California.”➕

Visual similarity to OEM parts

“Visually looks identical to OEM, same flex pipe as OEM, not mesh type.”➕

Dorman exhaust manifold fits well

“I went with the Dorman with the flex pipes built into it.”➕

Where it needs some work!

Areas to watch—feedback on possible improvements.

Dorman parts perceived as unreliable

“Dorman is typically better than oem.”➕

Perceived inconsistency in quality

“It's much cheaper than Dorman junk. Dornan has a few select good products, but mostly meh.”➕

Issues with exhaust leaks

“Don’t be like me.”➕

Inconsistent fit for certain vehicle models

“There are some scary reviews on Amazon - specifically for the earlier years, apparently EGR tube doesn’t line up?”➕

Compare On All Talked About Dimensions

Product Name	Price	Score	See Details	Buy Now
AUTOSAVER88 Exhaust Manifold Catalytic Converter	$142	9.3	Details	Buy
Dorman 674-773 Exhaust Manifold Kit	$89	7.5	Details	Buy
A-Premium Left Engine Exhaust Manifold Kit	$71	7.5	Details	Buy
A-Premium Right Side Exhaust Manifold with Gaskets	$64	6.9	Details	Buy
Dorman 674-937 Exhaust Manifold Kit	$89	6.8	Details	Buy
Dorman 674-685 Exhaust Manifold Kit	$84	6.0	Details	Buy
A-Premium Right Exhaust Manifold Kit	$59	5.8	Details	Buy
A-Premium Right Exhaust Manifold with Hardware Kit	$79	5.3	Details	Buy
A-Premium Engine Exhaust Manifold W/Gasket & Bolts & Nuts	$76	4.9	Details	Buy
Dorman 674-152 Driver Side Exhaust Manifold Kit	$89	4.9	Details	Buy
A-Premium Exhaust Manifold with Gasket and Bolts	$98	3.3	Details	Buy
Dorman 674-905 Exhaust Manifold Kit	$96	3.0	Details	Buy
Dorman 674-940 Exhaust Manifold Kit	$79	1.6	Details	Buy
A-Premium Left Exhaust Manifold with Gasket & Bolts	$85	1.3	Details	Buy

Core Power Plays

The specs and strengths that make it shine.

Discussion on using ARP bolts for better performance

“Curious on what others have done to deal with the notorious issue with an aluminum head and steel bolts and a steel manifold.”➕

“Get some arp grade 8 exhaust manifold bolts. It’s worth it.”➕

Discussion about the need for gaskets and fittings in exhaust repairs

“I did find that actually, good looking out!”➕

Discussion on durability compared to stainless aftermarket manifolds

“This has been the only one to last.”➕

“I appreciate the feedback!”➕

Discussion on bolt options for exhaust manifolds

“Are the Doorman worth paying 3x as much or do they last no longer than the cheapest?”➕

“If you want them to stop breaking you need 1” longer bolts and 1” spacers.”➕

Hidden Hero Hacks

Unexpected tricks and side‑door uses you’ll love.

Discussion on using Dorman clamps for exhaust quieting

“the Dorman Exhaust Clamps and they look promising to at least quiet the truck exhaust down.”➕

Discussion on alternative bolt options

“I wonder if FelPro, or APDTY is better? Or should I just purchase OEM bolts from ACDelco?”➕

“I probably paid as much for all of them as he's trying to pay for 1 bolt.”➕

“$39 on Amazon for ARP bolts.”➕

Discussion on tools for easier extraction of broken bolts

“If you remove the manifolds, just expect to snap more bolts.”➕

Buyer’s Cheat Sheet

What to check before you click ‘Add to Cart.’

Discussion on OE versus aftermarket manifolds

“A reputable shop recommended the oe manifold since they fit the best and maintain the torque in the 4.7L.”➕

“Just use an OE manifold. They obviously come with new cats and other than occasionally cracking don’t really have any other problems.”➕

“after talking to a few mechanics they said it is unlikely I would feel gains of the after market and the OEM are good enough.”➕

“I’m probably too skeptical to go that route unless someone can recommend them.”➕

Discussion about OEM versus aftermarket parts

“It’s the one thing under the hood that absolutely looks like hell.”➕

“But that’s a temp fix.”➕

“Update: Dorman clip helped somewhat.”➕

Challenges in installation due to tight spaces

“Very little room to install, took forever to get one of the bolts threaded. Worth it though.”➕

“the rear drivers side bolt is a bitch to get to.”➕

Limited options for OEM parts

“Who else is rocking the infamous Dorman intake manifold? 🤣”➕

“Can you even get anything else at this point on short notice considering the OEM part was discontinued?”➕

“There really isn't any other option, hopefully someone will prove me wrong.”➕

Consideration of headers as a replacement option

“I don't want to let it get worse.”➕

“Headers do need a tune but I picked up about 20 hp once it was all said and done.”➕

Discussion on aftermarket versus OEM parts

“What is everyone doing for intake manifold? Dorman?”➕

“The best route, I went trickflow myself, but not everyone has $800+ to drop on an intake manifold.”➕

“Very much good intakes to run as a basic reliability upgrade, even if you have no plans for future mods.”➕

Considerations for future performance upgrades

“If keeping stock, probably don’t need something like that, but trying to add some power.”➕

Discussion on price differences between brands

“Finally getting tired of my jeep sounding like a diesel 😂”➕

“so far everything is holding up nicely”➕

“It's holding up fine for about 40k miles now.”➕

Discussion on part compatibility for different models

“if the rest of it lines up.. oxygen sensor placement does not matter..”➕

“it will probably take too long by the time its sent from the usa anyway, need a quick fix before registration lapses.”➕

Advice on temporary fixes versus replacement

“if you're removing it, you might as well just replace it.”➕

“If it only needs to pass inspection, I would braze it, and then paint it with some high temp header paint.”➕

“That needs to be replaced.”➕

“There is a high temp putty that you can get from most auto parts chain stores that is good up to about 2400°f.”➕

Cautionary Callouts

Know the pitfalls before they catch you off guard.

Discussion about the reliability of aftermarket versus OEM parts

“I believe that D. Thorley long tube headers will mount right up no issues but anything else needs more fabrication.”➕

“I am running long tube Doug Thorleys with stock cats and a Gibson cat back.”➕

“I'm not paying that kind of money for exhaust manifolds.”➕

Discussion about installation challenges with the exhaust manifold

“I don’t think you have to pull cab experienced mechanics can do it in like 45 minutes though.”➕

“Its a shitty job.”➕

“Replacing the manifolds I thought was the easiest and quickest out of all of them.”➕

“My question is, can I just replace that stud if it’s broke?”➕

General talk about aftermarket options

“It sounds like a beast, and it's a manual so I feel like I'm driving a race car lol.”➕