ARC cores are well known in Japan to have highest flow and superior efficiency. Their side mount intercoolers for the Z32 have the largest core size (8"H x 9"L x 4"D = 288ci) among all the competition: Stillen is 9.4"H x 8.4"L x 3.5"D = 276ci, Greddy is 6"H x 8"W x 4.5"D = 216ci, HKS is 10.2"H x 7.8"W x 2.5"D = 200ci. ARC intercoolers are engineered for superior flow, notice the excellent design of the end tanks. The ARC intercoolers also mount at an angle, reducing the angle of the pipe bends for less pressure drop and allowing a wider core to be used.
As seen in the pics, they have a few bent fins (as do all used IC's) that could easily be straightened back out. They do not have any leaks.
Here is a link to order a new set of these SMIC's:
Rare ARC Intercoolers only $850 shipped! - 
