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I originally thought there was an error in the original posting, as it said 6.75 for caster, when the spec said you could only go to 45'. Didn't realized it was a decminal. I guess it's 0.75 x 60 seconds = 45'?
BTW...
I found out that the HK springs are NOT stiffer than stock. However, they will lower your ride by about 3/4". This I found out from the gentleman I sold my old HKs to. He had them tested and told me about the results. Lowering does help with the CG, but I have to retract my earlier statement that HKs were stiffer too.
Still, it's a decent buy at under 300 bones to lower your ride without compromising ride quality.
Go with the Euro spec... you'll love it! I know for an experienced fact that the Euro spec helped all around with traction and control.
Before the Euro alignment, the car would literally "snap", or "break" traction very suddenly. Now, I get much more warning through a skid - or slide, and I'm able to react before the car totally spins around.
(This is track experience)
I maxxed out the caster and have to agree that the understear that I was feeling before was greatly eliminated in same speed corners. However, maxxing out the caster will make the car feel a bit harder to turn. But with the power steering - who cares. Try it... you'll like it!
I've had four UK's S (see sig)
With various suspension and alignment set ups including the infamous UK alignment
I have to say my current set up is the most neutral and easy to drive