Review on Holley 20-13 Secondary Diaphragm Spring 🔧 Kit: Maximum Performance Upgrade for Reliable Engine Efficiency by Deandre Vogt

I should have read the reviews before buying. As it was marked as a Holley product and the part number was used I figured it would be from Holley. It is not. You will receive sprayed feathers in a heat sealed bag with a poorly cut copy of the feather size chart. I have tested my vacuum diaphragm with a bolt on the actuator rod with these springs and have had great results with the original Holley kit I ordered from Summit Racing. Holley springs are painted on the top only and come in a variety of lengths and colors. The seller's reply email states that they buy the nibs from Holley and then repackage them and they are genuine Holley products. You will be the judge.