Nuts!

[Yellow4g63]

Anyone know where I can find some like theseI need it in 10mm x 1.25. The one pictured is 8mm X 1.25 FRSport had the smaller ones not the largers ones. ATP use to have them but they don't stock them anymore.

[240z4u]

Use a unibit and open the holes up. Unless the hole in the gasket for the exhaust housing is too small.

Evan

[Yellow4g63]

It's for my turbo manifold. It's got too much Girth so I need to use a smaller nut. One a side note nut and girth lol have to get that out of the way.

[Carl H]

use exhaust manifold nuts...they work the trick.

[Yellow4g63]

use exhaust manifold nuts...they work the trick.

There too big to fit cause of the shed 80 gauge piping the manifold was made out of.

The tops are fine it's just the studs on the bottom are the problem. I'm not in Cali right now so I can't take any pics these will have to do if you can see why I need those smaller nuts.

[Shocker]

There too big to fit cause of the shed 80 gauge piping the manifold was made out of.

The tops are fine it's just the studs on the bottom are the problem.

I have the same issue with my manifold. You need to just loosely get all the nuts on first, then you can begin tightening them down. I start with the nuts that are the hardest to get first, i do each of them a few turns at a time then move to the next, slowly pressing the manifold into the head. It takes me a while, but it does the trick.

Good luck.

[SullivanRacing06]

loosen up the manifold and install the rear lower bolts first, or at least get the first few threads started then thread on the nuts you can easily get to, i know on one oof my old rb20s i had to make a 14mm claws foot to reach the lower ones.

good luck

*edited*removed racial slur, dont do this again.you have been warned.

[Yellow4g63]

I have the same issue with my manifold. You need to just loosely get all the nuts on first, then you can begin tightening them down. I start with the nuts that are the hardest to get first, i do each of them a few turns at a time then move to the next, slowly pressing the manifold into the head. It takes me a while, but it does the trick.

Good luck.

I was trying to avoid micro wrenching lol drives me crazy. I might have to find my short 14mm box wrench fak.

[240z4u]

The studs are too long obviously, shorten them. That should make it a little less painless.

Sorry, I totally missed the boat on what you were asking the first go-round.

[gawdzilla]

arent the stock manifold-to-head studs m8s? any reason why you are using m10? i use the factory studs with factory nuts and "yokes" or whatever they call those thick washers without issues..

12mm instead of 14mm nut head sizes should help a lot..

[Yellow4g63]

The studs are too long obviously, shorten them. That should make it a little less painless.

Sorry, I totally missed the boat on what you were asking the first go-round.

I wasn't clear enough the 1st time so no problems.

[Yellow4g63]

arent the stock manifold-to-head studs m8s? any reason why you are using m10? i use the factory studs with factory nuts and "yokes" or whatever they call those thick washers without issues..

12mm instead of 14mm nut head sizes should help a lot..

I thought it was m10 on the factory studs. Anything that can keep me from micro wrenching is a good deal to me.

[gawdzilla]

I thought it was m10 on the factory studs. Anything that can keep me from micro wrenching is a good deal to me.

weird... on the 26 i'm PRETTY sure they nuts are 12mm heads, so probably m8s. on the manifold to turbos they are 13mm heads factory IIRC, and for the greddy manifold to turbos they are 14mm heads (m10).

did you change your head to manifold studs out at some point?

[BHFR-GTR]

on my 26 i took out the studs and installed allen head bolts all arround and it worked amazing, btw im using a full race mani dont know if the clearance is diff

[Bluefire]

RB26 exhaust studs and nuts are 8mm

RB25/RB20 exhaust studs are 10mm

For the original poster, it looks like your installing a 6boost manifold. I installed one for someone and it came with shorter studs along with new nuts.

I tried putting the manifold over the factory studs and it hit the runners. If you didn't get the shorter studs I would buy a new set. I believe SR20 studs are like 10mm shorter. As for the nuts, I would not use the ones pictured above unless they are copper. Copper nuts work great but they are super expensive and hard to find.

Stay away from the steel version of those nuts. As well as stainless steel nuts. They both have a high probability of siezing on the stud from personal experience.

I highly recommend stock factory style, mild steel locking nuts or just some basic mild steel non-locking nuts (tightened properly, they should not come loose)

[Bluefire]

Also 8mm nuts generally come in a 12mm or 13mm head. 11mm head nuts are super rare but they are out there.

10mm nuts generally come in 14mm, 15mm, and 17mm head.

[Yellow4g63]

RB26 exhaust studs and nuts are 8mm

RB25/RB20 exhaust studs are 10mm

For the original poster, it looks like your installing a 6boost manifold. I installed one for someone and it came with shorter studs along with new nuts.

I tried putting the manifold over the factory studs and it hit the runners. If you didn't get the shorter studs I would buy a new set. I believe SR20 studs are like 10mm shorter. As for the nuts, I would not use the ones pictured above unless they are copper. Copper nuts work great but they are super expensive and hard to find.

Stay away from the steel version of those nuts. As well as stainless steel nuts. They both have a high probability of siezing on the stud from personal experience.

I highly recommend stock factory style, mild steel locking nuts or just some basic mild steel non-locking nuts (tightened properly, they should not come loose)

yeah they are copper and no it's not a 6 boost manifold. I had the head redone a few years ago before it went back on the car. Installed new oem studs.

[gawdzilla]

RB26 exhaust studs and nuts are 8mm

RB25/RB20 exhaust studs are 10mm

Stay away from the steel version of those nuts. As well as stainless steel nuts. They both have a high probability of siezing on the stud from personal experience.

I highly recommend stock factory style, mild steel locking nuts or just some basic mild steel non-locking nuts (tightened properly, they should not come loose)

thanks for the correction. sorry about the misinformation.. thought they'd be the same i've also had bad luck with stainless relief-cut nuts seizing when trying to remove them. had to cut them off with a dremel.. not fun. for the manifold, whenever you find whatever nut/stud combo size that works, i'd recommend just a regular nut too. manifold to head nuts don't back off really. tq it right and use some anti-seize. helps the nut from seizing as well as loosening itself.