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Old 05-22-2019, 12:23 PM #1
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V8 4.7L Exhaust Manifold Stud Specs
Anyone know what the specs are for the V8 4.7L exhaust mani stud? Same as the V6 4.0L?

I assume M8 x 1.25 but multiple part numbers exist for 4.0 and 4.7L. Which makes me think the length might be different.

ARP makes an exhaust manifold stud kit for the 4.0L. Ultimately I want to know if they are the same specs. I’m thinking yes but need to verify. If anyone has some studs sitting around and can post the specs including length that would be awesome.

4.7L
9008012007

9008012008

4.0L
9011610150
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Last edited by Formidable; 05-23-2019 at 12:33 PM.
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Old 05-22-2019, 04:57 PM #2
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Does this help
V8 Exhaust Manifold Stud Size and Length
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Old 05-22-2019, 05:01 PM #3
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Thanks. Looks like M10x1.25 40mm length.

So much for that. There are options but the broaches are different. Will need to get creative.

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Old 05-22-2019, 05:38 PM #4
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Do yourself a favor and use these...

STAGE 8 8919 4.7L V8 TOYOTA 10MM HEADER KIT
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Old 05-22-2019, 05:49 PM #5
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Hmm... That thread is different. M10 x 1.5. I will order an OEM stud and do it the old fashioned way. Measure it out.

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Originally Posted by 0verland View Post
Do yourself a favor and use these...

STAGE 8 8919 4.7L V8 TOYOTA 10MM HEADER KIT
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Old 05-22-2019, 06:28 PM #6
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Quote:
Originally Posted by Formidable View Post
Hmm... That thread is different. M10 x 1.5. I will order an OEM stud and do it the old fashioned way. Measure it out.
Exact ones that I used on my DT setup. No issue....
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Old 05-22-2019, 08:09 PM #7
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Good to know!

I wonder if the inboard thread is 1.5 distal to the broach... and the outboard thread is 1.25. Which could be why I’m hearing different info. Take a look at the following pic. Could be the angle but the threads do look a bit different.

I will know soon enough. Will obtain a genuine stud and update this thread... pun intended

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Originally Posted by 0verland View Post
Exact ones that I used on my DT setup. No issue....
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V8 4.7L Exhaust Manifold Stud Specs-3b08b714-9d6c-4fce-a109-7ff95fa45867-jpg 
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Last edited by Formidable; 05-22-2019 at 08:13 PM.
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Old 05-23-2019, 09:03 AM #8
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Thumbs up
Obtained an OEM stud last night.

OEM 4.7L stud is 10M 1.25 x 40mm length. Confirmed. Inboard and outboard threads are the same.

If anyone is interested, the following ARP stainless exhaust manifold kit *should* work with DT headers. Obviously don’t know for certain and would need to test fit as the broach is bigger than stock, (DT header flange is 3/8”), and the overall stud length is 8mm longer.

ARP Stainless Steel Accessory Studs 400-8036 - Free Shipping on Orders Over $99 at Summit Racing

Pics before and after install of ARP studs with DT headers on a 1GR Tacoma below. Something to consider if you are already going to be elbow deep in a shitty header install anyway. This is primarily an aesthetic upgrade. The ARP studs are stronger than OEM but absolutely not necessary.

ARP Head-Header Studs | Tacoma World
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V8 4.7L Exhaust Manifold Stud Specs-36478583-b6cd-4c80-813e-b918dbe09c6e-jpg  V8 4.7L Exhaust Manifold Stud Specs-135984ce-a205-491e-b551-f217931704fb-jpg 
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Last edited by Formidable; 05-23-2019 at 12:41 PM.
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Old 05-22-2021, 08:47 PM #9
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Are these the bolts/studs you used? Shopping Cart
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