Very pleased with this kit for overhauling a Holley 4160 carburetor with secondary vacuum. The only item not included in the kit, but perhaps should be, is a beveled metal disc that mounts on top of the spray nozzle. Not a big deal as I just reused my existing washing machine. In addition, none of the supplied electronic clamps are suitable for connecting the secondary membrane. Some of them fit a little, but they weren't installed properly. There was no problem simply reusing the existing clip that came with my carburetor. Ultimately I would recommend this set and buy it again myself. A good product!