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Under car crossmember question

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Old 02-21-2011 | 04:45 PM
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CA Under car crossmember question

There are a couple of cross members under the 2005 RX8. One just under the transmission tail shaft and another a little further back. I was able to bend both of them to the extent I needed to replace them. The new forward cross member came with a 12mm x 1.25 bolt with a very unique machined end threaded into a bung about midway between the mounting bolts. Can anyone tell me the purpose of this bolt?

Thanks in advance.

J. Apollon
Old 02-21-2011 | 05:38 PM
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Wow, I was wondering the exact same thing, I bent mine and when I installed the new one it can with that weird bolt... I noticed that it was physically imposible to threat it in all the way once in place because it ran into the tranny so I just assumed it was ment for the AT transmission maybe
Old 02-21-2011 | 05:47 PM
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How are you guys bending these things? Bottoming it out or body flex? If its body flex you might consider the autoexe replica made by tcsportline and sold for a few hundred on ebay. Some agrue the effectivness of chassis brace and think its a waste of money and added weight, but I would rather install it and have no problems, then not install it and tweak the body.
Old 02-21-2011 | 06:54 PM
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Oops

Highway, I hate to admit it but I bent my going through a car wash! My sense is that they are of little value, however I like to keep all of the original pieces in place.

J. Apollon
Old 02-21-2011 | 07:07 PM
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Originally Posted by japollon
Highway, I hate to admit it but I bent my going through a car wash! My sense is that they are of little value, however I like to keep all of the original pieces in place.

J. Apollon
HAHA, I knid of figured but I thought I would ask.

Mazda installed them for a reason. The stock units are fine for the street and you probably wouldnt notice them if they were missing, but I track my car hard which is why I installed the beefier/heavier aftermarket pieces. Like i said, playing it safe.
Old 02-22-2011 | 08:30 PM
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I have the OEM stock cross braces that goes underneth the midpipe if anyonw wants it.. PM for a price.. basically just offer me something for them
Old 10-10-2015 | 04:18 PM
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Can someone tell me what is the name of part in white box ? I got it scraped badly by a manhole cover popping out on the top of uphill road . I went to Sears and they told that it's called cross-member and it will take them around 6-7 hours to fix it. For some reason they have to suspend engine too!! Looking at the image I don't think there is a requirement to suspend engine and it should be fairly simple to replace it.. Any suggestions? If someone has come across any video demoing to replace it ? I am also sharing the picture of the same part in my car. It has started making too much noise and I want to get it done ASAP.





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