Yeah super lows seem the way to go.. 320 is just a little bit to low for me i think id be happy with 340 nice but still just legal.. dont want any prob with yellows lol

would king springs be good for a my06sti?

Too be honest, NO!
You just spent 60 THOUSAND DOLLARS (and thats a fair lump of money) surely u can afford coilovers or something QUALITY?

i m focusing more on sound system/ power mods.
and planing to get air suspension so for now a desent set of springs would do for me.

Please Please Please Please Please Dont Put Air Suspension In An 06 Sti!!!

All that lovely suspension setup, the DCCD, etc...and your going to TOTALLY destroy the geometry and setup by putting air suspension? I'd strongly advise AGAINST doing that.

air suspension? You may want to research that a little bit more if your also doing sound system.

On topic, I have super lows, the car still sits reasonably high but is 74mm from the lowest point of the car to the ground. Only because of my exhaust though. Occasionally scrape across speed bumps and things, would hate to see what the ultra lows are like going through a shopping center.

Put sum decent shocks in there to stiffen it up - and you dont really have that problem.. car is stiff enough not to excessively 'bounce' after going over a bump.. dont really have that much of a problem. Tho always having lowered cars has helped with the technique..

IMHO - id still like to go lower.. handles like a dream in current form.

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I'm just impatient and go over speed bumps a little too fast sometimes hahaha. Not the cars fault at all.

Looking at getting adjustable shocks when the stockies die a painfull death.

Adjustable coilovers are the go for height freaks as bakks clearly showed us all.

I see and sounds like a good plan In that case, why spend money on new springs when u can just chop the current ones? Dump it on its ass and blast out some killer tunes & bass

I don't know much about suspensions (except that judd should not have got suspended this year), but what brands do adjustable coilovers and what sort of range are you looking at?

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Speed doesn't kill. Suddenly becoming stationary does!