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Old 04-18-2013, 05:27 PM   #9
RAWR BRZ
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Join Date: Sep 2012
Drives: 2010 BMW M3, 2013 Subaru BRZ
Location: Orange County
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Quote:
Originally Posted by Dave-ROR View Post
This will be their answer:


The reason for the different part numbers is because of the length difference (and the rate of course). The part numbers follow this format: LGTH.DIA.RATE.

So the standard front spring is 0600.250.0275, while the standard rear spring is 0700.250.0350. Swapping them at a given collar height will result in the front going up an inch, and the rear going down an inch, so depending on the desired ride height you may not be successful in swapping them from one end to another. If you are at a specific height, you could lower the collar 1" in the front (plus/minus whatever threads to get the same end height due to the change in spring rate) and raise the rear 1" (plus/minus again).

Your car must have been slammed initially! I'm planning on (more or less) lowering my car as close to 0" as possible.

Mark's a great guy, another ITR friend He believes I shouldn't have to lower the car at all but I'll probably lower it half an inch or so. We'll see.

Did you keep the factory rake? I plan to initially.. need to measure it before install.
That makes a lot of sense and I agree with you on that. Perhaps there are less adjustments in height in the rear so they use the "0700" springs there. My car was stupid slammed. If you mean factory rake as in even balance of lowering the car as in 1 in front and rear, I have no idea. We just moved it up 10 more threads on the preload to raise the car up so it wasnt slammed. I am getting my car redone Friday to make sure everything is good to go. I would prefer which ever that is more beneficial. Shouldnt of rushed the install
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