When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
square bore , the list number is on the front of the air horn . Holley made many versions of the model 4180 , you will need that number for application and the proper rebuild kit.
list # 80452 is a model 4160 , 600 CFM. the 1828 is the date code. If you need more infoe go to the Holley site it has all you will need for rebuilding specs.