Rebuilt carbs by Z Therapy. They are a matched pair, with high performance airhorns and KNN chrome air filters. Larger throttle shafts with needle bearings and center linkage. Needle jets are set for 5000' elevation. Installed originally on a '73 240Z so it would pass emissions. Drove car lightly for three months and then took them off the car. $600 buyer pays shipping. Email for further information at jla@mywdo.com or call 970-484-9094 and ask for John. Located in Colorado.