The reason for the spacer is to change the roll center on the front of the car. It will also change the arc of the lower control arm and therefore change the camber curve. Slicks like a much different setup than radials and do not like drastic camber change. The spacer is fine but concentrates all the bending force to the intersection of the spacer and lower section of the upright. Check it on a regular basis.
When you lower the car to production ride height you will have already used up most of your strut travel and are close to bottoming the insert. Good check is to set the car on blocks under the rockers at intended ride height with no springs. Then raise the wheels and see if you have proper travel. I would suggest raising your upper strut mounts before just dropping the spring perches if you are even close. Good time to check your bump steer on the front and space it down to match your new pivot point.
Good luck and the advice is worth what you paid for it.:026:
Steve Eckerich
ITS 18 Speedsource RX7
ITR RX8 (under construction)
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