Originally Posted by Dominic Toretto
My car is lowered with the P springs and my stock LCAs are not parallel anymore. I have since ordered BMRs relocation brackets and LCAs to correct the issue. Bare in mind, I also changed the wheels and tires, so that may also have effected the sustpension height of the car. There are a few ways to adjust the suspension, so not to get too confusing, I had the same question as you. Long answer short, you don't "need" to adjust the angle of the LCAs however, when you lower the car, the suspension changes and when you accelerate the rear is getting less traction because the angle of the control arms has changed. The rear of the control arms raises. They need to be flat. You can drive as is but, you will be be getting the traction that you should. BMRs relocation brackets has three available setting to adjust the LCA angle.
-Alex
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Changing the wheel/tire height won't affect the suspension height, just the appearance of the suspension height (taller tire makes the car look lower, vice versa). It will change how the geometry of the suspension works with the car and putting down traction.