I hear a lot of people mentioning LCA's and they say they are a big improvement, but do UCA's help a lot too or are they not worth the money?
adjustable upper control arm will allow you to adjust the pinion angle. thats especially good if the car is lowered, or if it sees track duty. the LCAs really help the wheel hop, and some have had luck with the wheel hop when only replacing the upper.
The upper I have dramatically increased the road noise and ride harshness. Unless your car is lowered a coupla inches I would not change it. I go to the track a lot and lowered my car so that is the only reason I changed mine. It's not a super easy job either, not bad, not easy.
I concur, its a great mod for a regular track goer. But once I had mine installed, I did notice significantly more road noise. I have the CHE uca on my car.
