[BioHAzard050]

Allrighty, Im on the cusp of ordering a set of thorley headers to replace my leakomatic manifolds. My usual mechanic is hesitant to spit out an estimate until he can take a good look at both the truck and the headers. Thought about doing them myself but its a bit beyond my mechanical skillset and my physical toolset. Anywho, those who paid someone to install em, what did it run you?

[Krayziekid]

Subscribed. I am also interested in this.

[RockyRider]

I just went through the process of replacing my leaking exhaust manifolds with the Doug Thorley Headers and I'm very happy with the end result. These new headers are a big improvement over the stock manifold so I'm hopeful that I won't have to worry about hearing or smelling exhaust flues in the cabin ever again.

Checkout my thread to get an idea on the prices I was getting from different shops in my area.

My head is spinning...What to do about exhaust manifold leak?

I called and visited a lot of shops in my town and end-up going with Guys Muffler (Link). I cannot say enough good things about them. They did great work and gave me a very fair rate. The book hours on this job was 19, but they got it done in 10 and charged me accordingly.

I had them remove the old exhaust manifolds on both sides, install the new headers, weld on the new cats, and remove the pair of secondary cats.

After the headers and new cats were installed I saw at least a 2mpg improvement, but no noticeable change in performance or sound except that it was much quieter after the exhuast leak was fixed. The thicker header tubing I think also helps suppress sound in the engine.

A month later and had them install the largest straight-through muffler that Magnaflow makes and then I noticed an improvement in performance, although the sound was hardly any louder that stock muffler. I guess that's my fault for being to conservative with selecting a muffler. I might go back later and have them remove the stock resonator to see if that increases the sound.

The stainless muffler I had them install looks really nice so I don't want to have to swap that out.

Good Guy Muffler Cost/Parts Breakout
$685.00 - Doug Thorley Headers
$283.32 - 2 Magnaflow Cats (Part # 99235)
$75.00 - 1 Magnaflow Stainless Steel Muffle (Part # 12589)
$85.00 - Labor Muffler Install
$850.00 - Labor Header/Cat Install Both Sides
$1978.32 - Total Cost

[BioHAzard050]

Originally Posted by RockyRider

I just went through the process of replacing my leaking exhaust manifolds with the Doug Thorley Headers and I'm very happy with the end result. These new headers are a big improvement over the stock manifold so I'm hopeful that I won't have to worry about hearing or smelling exhaust flues in the cabin ever again.

Checkout my thread to get an idea on the prices I was getting from different shops in my area.

My head is spinning...What to do about exhaust manifold leak?

I called and visited a lot of shops in my town and end-up going with Guys Muffler (Link). I cannot say enough good things about them. They did great work and gave me a very fair rate. The book hours on this job was 19, but they got it done in 10 and charged me accordingly.

I had them remove the old exhaust manifolds on both sides, install the new headers, weld on the new cats, and remove the pair of secondary cats.

After the headers and new cats were installed I saw at least a 2mpg improvement, but no noticeable change in performance or sound except that it was much quieter after the exhuast leak was fixed. The thicker header tubing I think also helps suppress sound in the engine.

A month later and had them install the largest straight-through muffler that Magnaflow makes and then I noticed an improvement in performance, although the sound was hardly any louder that stock muffler. I guess that's my fault for being to conservative with selecting a muffler. I might go back later and have them remove the stock resonator to see if that increases the sound.

The stainless muffler I had them install looks really nice so I don't want to have to swap that out.

Good Guy Muffler Cost/Parts Breakout
$685.00 - Doug Thorley Headers
$283.32 - 2 Magnaflow Cats (Part # 99235)
$75.00 - 1 Magnaflow Stainless Steel Muffle (Part # 12589)
$85.00 - Labor Muffler Install
$850.00 - Labor Header/Cat Install Both Sides
$1978.32 - Total Cost

Eh...800 for labor sounds about right. Still cheaper than stock manifolds considering parts alone are 1500

[HOJeepster]

I was quoted $1300 for labor here in Denver area.

[4Running335i]

Ill be shopping around the Pueblo/CO Springs area when I get mine in the mail.

[neoguri]

Originally Posted by RockyRider

I just went through the process of replacing my leaking exhaust manifolds with the Doug Thorley Headers and I'm very happy with the end result. These new headers are a big improvement over the stock manifold so I'm hopeful that I won't have to worry about hearing or smelling exhaust flues in the cabin ever again.

Checkout my thread to get an idea on the prices I was getting from different shops in my area.

My head is spinning...What to do about exhaust manifold leak?

I called and visited a lot of shops in my town and end-up going with Guys Muffler (Link). I cannot say enough good things about them. They did great work and gave me a very fair rate. The book hours on this job was 19, but they got it done in 10 and charged me accordingly.

I had them remove the old exhaust manifolds on both sides, install the new headers, weld on the new cats, and remove the pair of secondary cats.

After the headers and new cats were installed I saw at least a 2mpg improvement, but no noticeable change in performance or sound except that it was much quieter after the exhuast leak was fixed. The thicker header tubing I think also helps suppress sound in the engine.

A month later and had them install the largest straight-through muffler that Magnaflow makes and then I noticed an improvement in performance, although the sound was hardly any louder that stock muffler. I guess that's my fault for being to conservative with selecting a muffler. I might go back later and have them remove the stock resonator to see if that increases the sound.

The stainless muffler I had them install looks really nice so I don't want to have to swap that out.

Good Guy Muffler Cost/Parts Breakout
$685.00 - Doug Thorley Headers
$283.32 - 2 Magnaflow Cats (Part # 99235)
$75.00 - 1 Magnaflow Stainless Steel Muffle (Part # 12589)
$85.00 - Labor Muffler Install
$850.00 - Labor Header/Cat Install Both Sides
$1978.32 - Total Cost

I was also quoted similarly in Chicago, IL

$380 - Labor per side
$90 - muffler install

The variables include: welding, rusted bolts, cost of studs/bolts, any others?

[Angstrom]

I was charged 16 hours labour. with taxes came to about $1800 CDN funds or $1365 USD. They said it was a real pain and hardly any room to work. I paid an additional $75 CDN to have the cats cut off, polished and welded on.

[Sue24u]

Originally Posted by 4Running335i

Ill be shopping around the Pueblo/CO Springs area when I get mine in the mail.

Hello,
I live in the Pueblo area and have been searching for someone between here and the Springs that I can call my 4Runner Guru. I am looking for the man in this area that knows this vehicles systems, quirks, and can provide the knowledge that I lack as a "new" 2007 4Runner owner.
Have you personally found this person yet to work on your truck?
I appreciate any help or direction you can provide.
Thank you,
Sue

[dmillerj1]

I could use a little help. I have a 2018 4 Runner Limited. I've recently installed a Borla cat back exhaust and a K&N Air Charger cold air intake. I have also installed a Pedal Commander. I have inquired about the cost to install Doug headers and have been informed that unless a tuner can crack the Toyota ECU there would not be much reason to install headers. Also, can I just eliminate the cat converter? Is there a real benefit to installing a so called performance cat converter over a stock converter? I'm thinking Doug Headers AND eliminating the cat converter as long as these mods would not require an ECU tune.

[JCTanner]

Originally Posted by neoguri

I was also quoted similarly in Chicago, IL

$380 - Labor per side
$90 - muffler install

The variables include: welding, rusted bolts, cost of studs/bolts, any others?

Hey Neoguri.

How was your experience with the shop you used in Chicago?
Looking to do this in the near future. Starting to look around for labor costs.

Thanks!

[DirtySouth89]

This website always talks about two options: the DT headers or the Toyota OEM manifolds that will just crack again eventually. But what about aftermarket manifolds that look thicker? Has anyone ever had those installed on a 4th gen?

[AuSeeker]

Originally Posted by DirtySouth89

This website always talks about two options: the DT headers or the Toyota OEM manifolds that will just crack again eventually. But what about aftermarket manifolds that look thicker? Has anyone ever had those installed on a 4th gen?

You may need to be more specific as to the aftermarket manifolds you're referring too, post a link!

[DirtySouth89]

Originally Posted by AuSeeker

You may need to be more specific as to the aftermarket manifolds you're referring too, post a link!

Well MagnaFlow makes a couple of 4Runner manifolds like this.
Security Check[]=ENGINE|4.7L

[Bernardchan96]

Wow i got quoted here in canada by a local muffler shop i have used before for welding and replacing pipes like $700 canadian for new header installs which is like $550 freedom bucks


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