This is really not a good or safe idea. Your suspension is going to get damaged

Coilovers would be the right solution here

 

looks pretty good, hows the ride?

 

Not that bad if I have the front level with the back instead of tucked in the fender. But I have the back all the way down. Im using the big clamps that you rent from the autoparts with the pins that lock the coil into place. About $90 for a front and rear drop. Just sharing a trick from back in the days when there were no drop kits and your only choice was cutting your springs or clamping them. Anybody on a budget can have their car dropped in about 2 hours.

 

 

This is when my front is tucked

This is when it rides smooth... im playing with the ride height almost daily adjusting for clearance while i setup my new exhaust

 

and for just $150 more you could buy a set of cheap ebay coilovers that would still ride better and be much safer than this!
These clamps are not designed to be used under loads like you get from a 4,000lb sedan on a highway putting stress on them with every minor bump. You're putting yourself, your passengers, and the general public at risk.
Trust me I'm all for cheap ways to accomplish stuff but this is just dangerous man, and unnecessary when you can buy coilovers for $250-$300 bucks

 

 

This is beyond unsafe just lower the car properly, there is cheap coilivers for $250 for this car on ebay. There is literally no point in doing this.

 

A very bad idea...

 

I would never buy them but its better than him using spring clamps to lower his car. I would buy bc's with swift springs, adjustable suspension arms and do it correctly but that is just me.

 

Have to agree this is a questionable way to get an aesthetic result at the risk of safety. The LS430 is built for comfort and a quiet ride on the highway and while coilovers is the best approach even that sacrifices some of the smooth ride.

Not sure I would go with low cost parts and it is best to invest in acknowledged manufacturers especially if the OP sees this as a long term vehicle.