I would only buy one if they didn't make a generic manifold, and made the right kind, unlike in that picture. The runners need to be long, and progressivley get smaller as they near the head to create turbulence. The injectors need to be at a angle shooting towards the heads as well, about 1" down the runners and at an angle less than 20 degrees. Also unlike the picture it would be nice if they actually made the damn thing symettrical. Otherwise I'm not paying 650 for a chromed out metal tube that is less progressive than our stock one.