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can't find long manifold studs help!

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Old Sep 16, 2020 | 09:34 PM
  #1  
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Default can't find long manifold studs help!

I pre-fitted my t3 turbo manifold and, to my surprise, the stock studs aren't long enough.

stock stud: M10x1.25 stud (around 45mm length)

From the looks of the picture below, it looks like I'll need about double the length of the stock studs in order to be able to get the manifold over all the studs and have room for a lock nut to secure the manifold.

I know some people drill out and put expensive ARP 1.5 thread studs in there, but I really don't want to re-tap my stock head. Anyone know where I can find extra long M10x1.25 studs? I checked Ace Hardware store, my local advanced auto parts, and no one has anything. Ebay doesn't really have anything...
and the only thing I can see is a "threaded rod" in 100mm length but it's coming from China and that's two months away due to pandemic situation. Anyone know where I can get song extra long M10x1.25 studs (that are strong enough and wont break)?


Old Sep 16, 2020 | 09:39 PM
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I'm by no means a hardware expert but what about these on McMaster-Carr?
Old Sep 16, 2020 | 10:53 PM
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Originally Posted by RedNB
I'm by no means a hardware expert but what about these on McMaster-Carr?
Thank you. That is one option. To buy the 300mm length one and cut it into 4 making it 75mm each (which should work). I appreciate you showing me that website. They have just as much if not more than fastenal!

I'm just worried about cutting the ends and hoping the nuts will fit onto the cut ends and still spin (and not get caught on the cut thread) . I'll probably just send it and cut it into 4 with a dremel.
Old Sep 17, 2020 | 12:30 AM
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Why can't you use bolts?
Old Sep 17, 2020 | 11:29 AM
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If worried about treads just screw nut on then cut .Grind lightly and back nut off.
Old Sep 17, 2020 | 01:34 PM
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Originally Posted by SpartanSV
Why can't you use bolts?
not supposed to use bolts. The stretch the threads when torquing down.. not good for the head. Supposed to use studs because they won't cause issue's that bolts will.
Old Sep 17, 2020 | 01:35 PM
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Originally Posted by Dpmiata
If worried about treads just screw nut on then cut .Grind lightly and back nut off.
true, hahaha why didn't I think of that...
Old Sep 17, 2020 | 01:54 PM
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Flat file held at 45* and file the end of the stud after the cut. Perfect threads every time.
Old Sep 17, 2020 | 02:26 PM
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Originally Posted by wrxrick
not supposed to use bolts. The stretch the threads when torquing down.. not good for the head. Supposed to use studs because they won't cause issue's that bolts will.
Is this documented somewhere?
Old Sep 17, 2020 | 02:39 PM
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Sounds like partial hogwash to me. A stud or bolt of the proper length aren't doing anything different. Could easily see it being a problem if the bolt is too short though, damage could possibly be done all the same if you didn't set the studs deep enough, too.

It has been a while, but I am pretty sure LSx engines use bolts, tiny little ones.
Old Sep 17, 2020 | 03:34 PM
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just read about it all over the internet, guys. I'm no expert .
Old Sep 17, 2020 | 05:02 PM
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Maybe my Googlefu sucks but I couldn't find anyone saying what you stated here.
Old Sep 17, 2020 | 08:15 PM
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Belmetric. I just ordered these studs, they work perfect. Maybe just a hair too long, but easy and quick.

https://www.belmetric.com/m10x125-fi...u195t4p81uti54
Old Sep 17, 2020 | 09:57 PM
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Ok guys I took some ideas from this thread...

Just bought a grade 10.9 bolt from ACE Hardware and making my own da## stud. M10x1.25 in 70mm length bolt. The cut isn't pretty but a properly sized nut actually threaded on pretty easily. Still don't feel too confident about this but I suppose it "works."

@Fluffers Miata thank you! I'm going to order some of those as well




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