I recently swapped the engine on my '06 SS/SC after blowing it up last fall, and bought these control arms to replace the worn OEM ones with cracked bushings. Paired them with the Excel-G struts available here on ZZP, and re-used the stock spring, dust cover, and those two pieces at the end of the spring.
(Also with Billet engine mount and stock replacement solid poly bushings) My car now spins the tires instead of rattling the front end. There's no more torque steer, and I can whip it around 70 kph corners at illicit speeds with two fingers on the wheel; it's that confident - on "racing slicks" of all season tires. Makes it a completely brand new car on the front end.
They are expensive, and the trailing ball joint is bare so keep that in mind when driving through dirty conditions. But it can be easily removed and replaced. The ball joint and leading bushings are both greasable, unlike stock, and should last forever.
If you want to improve your handling and don't mind putting a few dollars and a couple hours into the car, then these will serve you well.
They don't come with instructions, but you need to adjust the trailing ball joint out of the box. I unscrewed it enough to line up with the rear frame bolt hole, then counted the threads and applied the same on the other side.