I gave this product two stars because it was a little below average but still quite disappointing. Holly needs to reevaluate her kits because Fast Fuel and pretty much everyone else makes better kits for the same price. This is a Holly secondary vacuum carburetor kit, so you may have thought it had a vacuum secondary diaphragm, but you were wrong. Order a Quickfuel 3-200 or AED equivalent for a higher quality seal. I ordered this because the QFT 3-200 didn't fit at all, so I thought I'd give this holly a try. Now I have to wait even longer for my quick fill set.