$360 for one more inch of suspension travel without bottoming out the arm on the car or having to cut a hole in the strut tower (downside is this adds +1 degree camber) Pictured below on LS400.
well technically yes its also possible to do this on the aluminum knuckle, we have done it before on a show car... but it would certainly be more expensive due to the time and care required to work with the aluminum material & know this is not a performance upgrade because its altering the camber gain outside of the normal path. My advice is to wait for us to release a z33 drop knuckle because there is a major performance advantage and no disadvantage other than time.