[geeaj]

Sportline's spring rates aren't very stiff for such a short spring. The pro-kits are much better for the street/daily speed racer crowd. Definately go with a progressive, as opposed to linear rate spring if you want some comfort.

I have prokits with AGX and I am pretty happy. I have mine dialed to 2 on the front and 4 in the rear for daily duty. Handles really neutral and I can induce controllable oversteer by light brake stabbing or clutch stabs mid corner to upset  the balance. If I set the everything to full max, I can feel my kidneys jiggle...literally. Most people won't need more then a spring/shock combo for the street.

As other members have noted, the coilovers (all shock/spring combos are technically coilovers by the way) are much better for a full duty track car since they are really not plug and play.

Going too low on a 240 is not advisable, we don't have much ground clearance to start and lowering only makes it worse. I've seen many bapped oil pans from cars that have been lowered too much. Our oil pans on the KA sit really low and it doesn't take much to crack it.Other thing is suspension geometry, go over 1.5 inch and you will need a camber kit. The cheap method is to slot the shock mount holes, but it is a pretty ugly hack job.