Originally Posted by
metalnut
Yes, you're spot on! Those are the two corners I'm talking about. I had the same "issue" with my previous car (Spec-R), so I thought it could be me. Glad to know you see it too.
Don't know for sure if this is the reason the FL and RR are 'heavier' but I put it down to the way the shock towers tighten up onto the bulkheads. As I tighten the front shock tower screws the shock tower might rotate slightly clockwise adding preload to the FL and removing it from the FR. When I turn the car around and tighten the rear shock tower it too can rotate clockwise a little and add preload to the RR and remove it from the RL.
Although that rotation might only be small but since it has an effect on both front and rear and it adds and removes preload all at once I think it could be the cause. Countersunk holes in the shock tower could help =]