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Old 11-21-2008, 11:08 AM   #1
AustinTX
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Default 06-07 STI lateral link bushings

What is the diameter of the bushings required for the rear lateral arms?
Measurements on 06-07 arms show a 33-34mm bushing is required.
Superpro kit SPF2808K shows a bushing of 38-39mm. Has anyone replaced these bushings before? Any ideas?

Thanks,
John
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Old 11-21-2008, 11:35 AM   #2
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Here's an actually pic comparing a stock bushing (07 STI) and a Superpro bushing from a recent kit. 4-5mm difference.

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Old 11-22-2008, 01:43 PM   #3
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Uhm.... I thought 06 lateral links were the same as 05, and in 07 they went back to steel ones?

Are you sure the inner and outer bushings are the same? I know at least on my 05, there's a difference in the bolt size going through the bushings.

-Mike
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Old 11-29-2008, 10:37 AM   #4
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More information....

It turns out that that 06-07 have the same size arms as the WRX but in aluminum. The Superpro SPF2808K kit will thus not work on the 06-07 STI (at least not the US versions ). It looks like the SPF1463K kit should work but not sure the exactly what items are in that package as of yet...I'm waiting on them to arrive to check them out. I'm very eager to get my ride back together (it's been on stands for 2 months due to the latest mods - including bushings).

This appears to have caught a few folks by surprise. Interesting and unfortunately a confusing issue. Nobody including Superpro was aware of this and I wonder how folks actually installed the SPF2808K kit on their 06-07 STIs (or maybe they didn't).

More to follow...

As for the bolt size..it's actually a sleeve different in the after market versions. The bolts looked identical....but what a PAIN to remove. They were torqued down to some very high levels. Ended up air-hammering 2 of them off the arms (both front lateral arms). Nuts....even the trucks I play with NEVER have such high torque on any nut/bolt...

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PS: This post was initially mine but since I'm a noob out here...I could not post since I had not replied 3 times to any other thread. Is that really necessary? Interesting way to manage spam...no other thread I have ever dealt with does that!
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Old 12-08-2008, 07:57 PM   #5
trexit
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The WRX sized bushings did the trick. It appears there are some differences in the US STI and the Aussie STI.

I received the SPF1463K kit (WRX sized bushings) and they are install. They went in like expected. Here's a pic to compare the OD of the stock versus the bushings from SPF1463K.



In addition to this, MY07 requires the SPF1907K rear trailing arms bushing, which is also of WRX sizes. We suspect the 06 should be the same.
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Old 12-10-2008, 01:17 PM   #6
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How difficult were these to install?

Thanks

Ray
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Old 12-10-2008, 07:49 PM   #7
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We have noticed that Super Pro sometimes sizes the bushings larger than the opening they fit into once the sleeve is inserted. Strange really. Their front control arm bushings are this way. The bushings them selves fit easily, but the sleeve is a pain to get in as it expands the bushing as it is inserted.

The new Whiteline bushings that we have been trying work very well though. They are all press fit opposed to hand fit like the super pros.

Tony
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Old 12-10-2008, 08:56 PM   #8
grippgoat
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FWIW, I have super pro bushings in my miata, and have had a lot of binding problems because the lube dries up and then the bushing sticks to the metal inner sleeves. The lube that comes with the bushings sucks and disappears very quickly. I re-lubed the rear with some Honda urea grease, and it felt like I cut the spring rate in half afterwards, but I haven't really put enough miles on it to know how well it's lasting. I never got around to doing the front (because there's fewer bushings and more weight up there). Another local owner used some kind of marine grease with teflon in it, and seemed to like the results. On the miata, it's good practice to drill the arm and the bushing and install a grease fitting.

Since the Impreza doesn't have nearly as many bushings as the miata, I expect that binding isn't as much of a problem, even if the lube does dry up.

-Mike
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