i did a search and came up with some stuff but it didnt really answer all of my questions. Someone said that audio equipment in the trunk would cause the rear springs to sag, but Im making a custom fiberglass enclosure that replaces my back seat with three Type X's. I'd like to lower my car on sportlines with koni yellows and am getting the RK sport body kit aswell so bascially i just want to know if there will be a considerable amount of sag.

You shouldn't have a problem unless you have a really heavy setup.

Some people bitch that they're sagging 1/4 to 1/2 an inch with their new setup. Mostly because they are measuring now, where they never did before... But keep in mind:

Something like sportslines, have a spring rate around 400lb/in at ride height (they're progressive remember). If you have 100 lbs of audio equipment, which is not hard to do with 2 subs, an amp, and all that wood boxen... 100/400 = 0.25" lower from the weight.

Add a full tank of gas, your backpack, and all the @!#$ you've been meaning to clean out of your trunk may add more weight yet. Just keep that all in mind before you complain about anything being uneven.

i have a ported box that takes up my wholer trunk (like 8" from box to back of trunk) and is heavy as hell, and i have no problems

Zach wrote:You shouldn't have a problem unless you have a really heavy setup.

i think if your under like 150-200lbs in the trunk it should be fine.....and you could have a hell of a setup with that kinda weight...a ported box will add alot of extra weight, but also can push alot more bass soooo it's up to you really