My ITA 83 Rx7 has upper and lower control arms in rear. It only has bushings on lower arms. I hear a very loud banging when I give car gas, shifting ect. I figure the uppers are supposed to have bushings too, but I wanted to make sure if anyone new for sure, or a good place to order them. I just bought the car for drivers school so Im just realizing the problem. Thanks for any info.