Originally Posted by Car54
You will definitely change ride height as you'll be removing a stacked up part of the suspension. Make measurements before and after from hub or bottom wheel lip to fender. Watch lowering both front wheels at the same time to make sure the coils seat without the helper springs.
Post some pics since here aren't any!
Another tip is to place a piece of painter's tape on the fender, so that you know where you took your 'before' measurement!
Originally Posted by JAJ
You'll have to raise the spring perch 29mm (about 1-1/8") to get the same ride height. Make sure that there's enough thread above the perch before you start.
Basically, you're shortening the spring stack by removing 25mm of helper spring that's pressed from a spiral into a cylinder by the weight of the car, and 4mm of spring spacer.
Matches my data sheets exactly