There was an issue for a while where the VA manifold block (part of the AC hoses from FFR) had one of the ports that came out of the back of the block...toward the back of the car. Those manifold blocks would interfere with the Kooks headers, so we sold a different manifold block for a while that had both ports coming off the side of the aluminum manifold....staying flush to the back of the compressor to clear the headers. Later, FFR/VA changed that manifold block so that what shipped with the kit was the same as the manifold block I had available (what RR46 posted the photo of above) and no longer needed to be replaced.