gtspec rear strut cross brace - help with bolt

esfourteen · 07-01-2014, 10:34 PM

Hey guys, I heed some feedback from people who have installed the gtspec 4 point rear strut brace/harness bar. It comes with 2 new bolts to replace the seat belt bolts where it connects to the brace mount, however when I attempted to thread the bolt in I noticed it went in maybe 2-3 turns and then got tight so I checked the thread sizes, here is the oe bolt:

and here is the new bolt:

This is very clearly NOT the same thread pitch. How the hell is everyone installing these?

DEpointfive0 · 07-01-2014, 11:05 PM

Can you not use the OEM bolts?

esfourteen · 07-01-2014, 11:33 PM

Quote:

Originally Posted by DEpointfive0

Can you not use the OEM bolts?

no, its a longer bolt to accommodate the bracket.

esfourteen · 07-02-2014, 03:39 PM

so far the response from gtspec has been "these are the bolts we gave to everyone". looks like I'm on my own to source a new bolt here

speedfreek · 07-02-2014, 04:05 PM

I was in the market for the GT Spec bar. Maybe I should rethink this and try to source a Robispec harness bar instead.

Keep us updated on what you do about the bolt.

esfourteen · 07-02-2014, 05:06 PM

Quote:

Originally Posted by speedfreek

I was in the market for the GT Spec bar. Maybe I should rethink this and try to source a Robispec harness bar instead.

Keep us updated on what you do about the bolt.

i just got another reply after asking them to review the images I sent, they said they'll get back to me tomorrow. Worst case I'll go track down some M12x1.25 bolts of the desired length (need to measure).

inverted1 · 08-13-2014, 07:35 PM

I have a solution to the wrong bolt that gtspec supplies with their kit. I also contacted them about the problem and I am getting the same runaround you got. The original bolt is a M11x1.25mm. The bolt supplied is machined wrong. It is a M11 x about 1.15mm. It will start in the hole but will only go in about 2 turns until it tightens up. I am guessing it was made in China.

Get 2 each of the following:
7/16 x 20 TPI Grade 8 bolt 2.5 inches long.
7/16 flat washer with OD about .9 inch.
1/2 x 7/16 reducer 5/8 inch long.

I got the reducers on Ebay. Here is the link of what I bought.
1 2 to 7 16 Reducer Insert Spacer Heims Heim Joints | eBay

You can thread the bolt in by hand and it does not damage anything. I would also think it is stronger than the supplied bolt. I hope this helps anyone wanting to install this kit in their car. Other than the bolts, it is a nice kit.

07-01-2014, 10:34 PM	#1 (permalink)
esfourteen A True Z Fanatic Join Date: Mar 2010 Location: LI, NY Posts: 1,375 Drives: 40th TT Rep Power: 18	gtspec rear strut cross brace - help with bolt Hey guys, I heed some feedback from people who have installed the gtspec 4 point rear strut brace/harness bar. It comes with 2 new bolts to replace the seat belt bolts where it connects to the brace mount, however when I attempted to thread the bolt in I noticed it went in maybe 2-3 turns and then got tight so I checked the thread sizes, here is the oe bolt: and here is the new bolt: This is very clearly NOT the same thread pitch. How the hell is everyone installing these? __________________ Build Thread \| GTM TT Install Thread \| Engine Build Thread

07-01-2014, 11:05 PM	#2 (permalink)
DEpointfive0 Premium Member Bitches Join Date: Jan 2012 Location: SoCal Posts: 14,824 Drives: a lot Rep Power: 17151	Can you not use the OEM bolts? __________________ Do YOU want to know what/where I got my username from? ( Click to show/hide ) NSFW due to language:

07-02-2014, 03:39 PM	#4 (permalink)
esfourteen A True Z Fanatic Join Date: Mar 2010 Location: LI, NY Posts: 1,375 Drives: 40th TT Rep Power: 18	so far the response from gtspec has been "these are the bolts we gave to everyone". looks like I'm on my own to source a new bolt here __________________ Build Thread \| GTM TT Install Thread \| Engine Build Thread

07-02-2014, 04:05 PM	#5 (permalink)
speedfreek A True Z Fanatic Join Date: Feb 2012 Location: Huntsville,AL Posts: 1,724 Drives: '12 370Z PW 6sp Rep Power: 18	I was in the market for the GT Spec bar. Maybe I should rethink this and try to source a Robispec harness bar instead. Keep us updated on what you do about the bolt. __________________ Tomei\|Berk\|Takeda\|ZSpeed\|Fortune Auto\|Swift\|Eibach\|SPL\|Carbotech\|Motul\|Powertrix\|Stillen\|Aerojacket\|Z1\|Forgestar\|Enkei\|Project Kics\|Nismo Ti\|Llumar speedfreek's journal

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08-13-2014, 07:35 PM	#7 (permalink)
inverted1 Base Member Join Date: Aug 2012 Location: Savannah GA Age: 52 Posts: 5 Drives: 2013 Sport Gray M6 Rep Power: 13	I have a solution to the wrong bolt that gtspec supplies with their kit. I also contacted them about the problem and I am getting the same runaround you got. The original bolt is a M11x1.25mm. The bolt supplied is machined wrong. It is a M11 x about 1.15mm. It will start in the hole but will only go in about 2 turns until it tightens up. I am guessing it was made in China. Get 2 each of the following: 7/16 x 20 TPI Grade 8 bolt 2.5 inches long. 7/16 flat washer with OD about .9 inch. 1/2 x 7/16 reducer 5/8 inch long. I got the reducers on Ebay. Here is the link of what I bought. 1 2 to 7 16 Reducer Insert Spacer Heims Heim Joints \| eBay You can thread the bolt in by hand and it does not damage anything. I would also think it is stronger than the supplied bolt. I hope this helps anyone wanting to install this kit in their car. Other than the bolts, it is a nice kit.