My OEM one had a leak and a replacement one was going to be $160. I decided to get the driftmotion one instead for $65. So far its held pretty good even with boiling power steering fluid. I've only drifted 4 days with it though. My power steering is a bit heavier now when the car isn't in motion, but perfect otherwise. Super easy install. Its the steel-braided cable in the pics below.

1

2

 

Will this work with a '99 SC400? or is it different?

My tech says that I'm pissing power steering fluid :/

 

^^ I do not think it will work for the SC400. The line routing is different. However there is another alternative: take out your PS high pressure line assembly and bring it to a good professional shop that specializes in automotive pressure hoses and fittings. You can just have the line rebuilt with new pressed-on ends. You'd likely have to identify such a business yourself and instruct your tech to remove the assembly and send it to that place for service and get it back from them. There's usually a hose and pressure fitting shop like this in may cities.

But doing it that way the end result would be a renewed OEM pressure hose assembly without spending for (or hunting for) a new one from Lexus. With it being right in front of them they will be able to match the correct lengths and fittings exactly to stock.

All SC400's should use the same PS pressure line assembly. The low pressure OEM return line is usually much cheaper should you need it.