Actually, I believe the 4-cyl is heavier, so if you but 4-cyl springs on a 6-cyl, the front won't drop as much as it normally would.
You're joking right?
I just recall reading somewhere here that the 4-cyl was heavier due to more steel and less aluminum or something.
I've checked online for curb weights, and I can't find anything close to a static number to really be decisive.
I've seen listings of 6-cyl cars anywhere from 2759lbs to 3030lbs. I know my 4-cyl GL with every feature you can get on it (dunno why it's a GL) weighs 2900-ish.
At the most, the difference is only about 100lbs.
EDIT: Unless we're talking SVTs. Now that MoFo weighs considerably more than the regular 'Tours. Anywhere from 250-500 lbs more.
