overall the wagon is only 100lbs heavier than the svt
most progressive springs have a linear transition. the sportlines are designed to have a more exponential transition, which will give you the seemingly instantaneous change in roll center youre talking about.
Originally Posted by Dennis_Grant
Remember this list: Bilstein; Penske; Koni; Ohlins; Sachs; Dynamic Suspension.
Not on this list? Almost certainly crap.