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.
This may sound stupid but I'm trying to order a new Cap and rotor for my 94 f350 460 7.5l. And my 2 options are hei or eec iv. How can I tell the difference?