Add to Favorite Sellers. 53021610AF Mopar 45 Degree Oil Filter Adapter. Fits Gen III Hemi Engines; This oil filter adapter is a stock factory replacement, but it can also be used in Gen III Hemi Swap Applications for extra clearance to the K-member – where needed. Use w/ molded rubber seal 53021661AA & (3) bolts 6102041AA. Customer Service & Feedback. So we have a chance to make it right – we want your repeat business! Check out the official Holley Performance. For more great deals!!