Right now there are 135 deals from Amazon Resale, formerly Amazon Warehouse Deals, in Automotive › Performance Parts & Accessories › Engines & Engine Parts. These are inspected returns and open-box items that Amazon sells and ships itself. WarehouseHunter puts each one next to its current new price, so you can see what you save at a glance.

Brands with the most offers here: ARP, Comp Cams, Allstar Performance, Edelbrock, ProForm, Melling, Wix, Mishimoto. Every item is a one-off, so the stock moves all day and new deals keep arriving.