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I used 258 without issue.

I’m just thinking that the 18 means 1.75 pitch and 15 means 1.5? That’s why Im leaning towards the 285 over the 258. I also have a later year 4th gen, not sure if that matters at all

Also what is the proper part number for the hub fastener for the specB trailing arms?

One I've seen is 901000258 which is 12x50x15 fastener.

The other is 901000285 which is 12x47x18 fastener.

The 2009 legacy gt uses 901000174 which is 12x30x18.

Would it make sense to get the 285 because it looks like it matches the same thread pitch as the 174. But I read that the 901000258 is correct. Any help would be appreciated.

Proper fix is drilling out the old and welding in the new but, if there is a good place to cut an access hole the nut could be a good fix.

Doesn’t need drilled because the bolt just spins freely now with the nut from the unibody stuck on the other side. I guess I have to drilled into the frame and install a nut somehow? Or get a welder to tack in a new nut.

Pretty sure that threads in to a captive nut that is secured to the unibody structure. Worst part is I don’t think you needed to remove that nut to pull the trailing arm.

I couldn't get the bolt out without dropping the bracket down. Should I holesaw the body and secure the other side with a nut

Sways are cheap and easy to add later. If budget is an issue I would do the kta 124 with an alignment and add sways later if you feel you want them.

That’s how I see it too. Thank you for all the help

I think a lot of this will depend on what your goals are and what other parts you have. If the rest of your suspension is stockish, I wouldn't splurge for the adjustable stuff. If you want more options and need more components to help dial in your alignment, that's when I'd start adding new parts. Otherwise it's just bling.

 

Not that bling is bad, it's your car and your money. Build it how you want it.

Right now it's lowered on Tein Street basis coilovers. Front end has specB lower control arms w/ Whiteline roll center kit, Kartboy endlinks, poly bushings. Rear has specB trailing arms, Kartboy endlinks. Was considering the KCA124 since everything is basically out of the rear end, or if I should do sway bars first

AFAIK all years have them. They bolt on to the bottom of the trailing arm with three bolts.

Got the brackets. Flange bolts will be here Tues. Should I get the whiteline rear control arms? There’s also the godspeed camber arm. Are they worth it?

Yes you can use the factory steel lateral links. Be sure that your trailing arms have the brackets to attach the end links.

Do you know if there are certain years that don’t have the brackets?