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Dorman 674-937 Exhaust Manifold Kit

Curated from 70 real Reddit conversations

Refreshed on: October 22, 2024

Product Image 1

Dorman 674-937 Exhaust Manifold Kit

Brand: Dorman
Price: $89
Snoop Score:
6.8
Sentiment
5.0
Popularity
5.4
Technical
7.9
Buy on Amazon for $89See All Exhaust Manifold Reviews
As an Amazon Associate, I earn from qualifying purchases.

Snoop's Take

The Dorman 674-937 Exhaust Manifold Kit is designed as a precision-engineered replacement for specific vehicle models, ensuring a reliable fit and function similar to the stock manifold. Users have praised the manifold for its durable performance, with one stating, "this has been the only one to last," while others recommend using Dorman clamps for installation, indicating a strong preference for the brand's products. Despite some concerns regarding quality issues and high installation costs, the manifold's overall reception suggests it remains a viable option for those seeking aftermarket solutions for exhaust needs.

Not for you? Check out our other rated Exhaust Manifold

This has been the only one to last.

Positive Feedback

this 100% has been my favorite upgrade on my 4runner. It also came with better mpg and more power, so that was a bonus lol.

Negative Feedback
Product
6.8
Dorman 674-937 Exhaust Manifold Kit
Buy on Amazon for $89
Performance Enhancement
8 / 10
Aftermarket Replacements
8 / 10
Custom Repair Projects
8 / 10
Routine Maintenance
8 / 10
See how this compares to all Exhaust Manifold

What it does well!

Key strengths users can’t stop talking about.
Durable performance over time
“This has been the only one to last.”➕
Dorman clamps are recommended for installation
“Lots of folks use the dorman manifold clamps instead.”➕
“just go with the Dorman clamps mentioned.”➕
Dorman manifold holds up well over time
“It sounds like a beast, and it's a manual so I feel like I'm driving a race car lol.”➕
“I went with the Dorman with the flex pipes built into it.”➕
Includes necessary gaskets and hardware
“Dorman Exhaust Manifold a Good Option?”➕

Where it needs some work!

Areas to watch—feedback on possible improvements.
Quality issues with aftermarket parts
“this 100% has been my favorite upgrade on my 4runner. It also came with better mpg and more power, so that was a bonus lol.”➕
High labor costs for installation
“the lowest bid I've gotten to replace them is $6k.”➕
General quality concerns with Dorman products
“It's much cheaper than Dorman junk.”➕
Quality issues reported with Dorman products
“Don’t be like me.”➕
“There are some scary reviews on Amazon - specifically for the earlier years, apparently EGR tube doesn’t line up?”➕
Preference for OEM parts due to reliability
“OEM is trash and these are the parts always failing. Get your aftermarket stuff and enjoy a working engine.”➕
Concerns about leaks and PCV issues with Dorman parts
“Was hoping aftermarket improved on the issue.”➕

Compare On All Talked About Dimensions

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Dorman 674-905 Exhaust Manifold KitDorman 674-905 Exhaust Manifold Kit$96
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1.3
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Core Power Plays

The specs and strengths that make it shine.
General conversation about exhaust manifold upgrades and preferences
“OEM manifolds will crack eventually.”➕

Hidden Hero Hacks

Unexpected tricks and side‑door uses you’ll love.
Discussion on aftermarket solutions and temporary fixes
“It’s the one thing under the hood that absolutely looks like hell.”➕
“But that’s a temp fix.”➕
Discussion on using Dorman clamps
“the Dorman Exhaust Clamps and they look promising to at least quiet the truck exhaust down.”➕
“Thanks for the video and tips.”➕
Suggestions for temporary fixes
“If it only needs to pass inspection, I would braze it, and then paint it with some high temp header paint.”➕
“There is a high temp putty that you can get from most auto parts chain stores that is good up to about 2400°f.”➕

Buyer’s Cheat Sheet

What to check before you click ‘Add to Cart.’
Discussion about experiences with different brands and models
“I really hated my exhaust tick too and this 100% has been my favorite upgrade on my 4runner.”➕
“check my profile for reviews”➕
Discussion on alternatives to Dorman bolts
“I wonder if FelPro, or APDTY is better? Or should I just purchase OEM bolts from ACDelco?”➕
“$39 on Amazon for ARP bolts.”➕
Limited options for replacements due to discontinuation of 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?”➕
Comparison with other brands suggests Dorman is among the few viable options
“You can still get the FoMoCo but they are 6x the cost.”➕
Mention of other brands and alternatives
“I did find that actually, good looking out!”➕
Comparison to stock and other aftermarket options
“I am glad to hear that the Dorman has a chance of holding up.”➕
Discussion on cost-effectiveness of Dorman vs cheaper alternatives
“Are the Doorman worth paying 3x as much or do they last no longer than the cheapest?”➕
“Dorman is typically better than oem.”➕
Discussion on the necessity of replacement versus repair
“This doesnt have to be a great fix, just enough to get me through the Roadworthy Certificate inspection.”➕
“That has to be removed to be fixed...and if you're removing it, you might as well just replace it.”➕
“That needs to be replaced. That's not a job for JB weld.”➕

Cautionary Callouts

Know the pitfalls before they catch you off guard.
Discussion on OEM vs aftermarket manifolds
“The downside is that the design hasn’t changed and so they will eventually crack again.”➕
“Just use an OE manifold. They obviously come with new cats and other than occasionally cracking don’t really have any other problems.”➕
“the OEM are good enough.”➕
“I’m probably too skeptical to go that route unless someone can recommend them.”➕
Discussion on experiences with headers and installation issues
“Headers do need a tune but I picked up about 20 hp once it was all said and done.”➕
Discussion on experiences with exhaust manifold issues
“It's clear my budget is 10 year old Fords with factory issues 😅 that's okay.”➕
“I don’t think you have to pull cab experienced mechanics can do it in like 45 minutes.”➕
“It's a shitty job.”➕
“If you take off the wheel, and get your self a nice chair, it’s a pretty chill job.”➕
Discussion about emissions testing and Dorman approval
“Dorman should say if they are approved in California.”➕
Advice on using longer bolts and spacers to prevent breakage
“If you want them to stop breaking you need 1” longer bolts and 1” spacers.”➕
Mention of ODB-II codes related to Dorman parts
“When the diaphragm cracks open, this creates a vacuum leak.”➕

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