Two features decide whether fitment feels finished
A dropdown that filters a collection is table stakes. What makes shoppers trust it is the compatibility table on the product page — proof, in writing, that this part fits their vehicle — and the saved garage, so they do not re-enter it next visit. EasySearch puts both on the $75 Premium plan. ViewForge ships both on the free tier, as theme app extensions, alongside the search widget and the product-page notice.