Advanced Engineering Features: Engineered with precision, the IAG Performance EJ Competition Series Oil Pan incorporates several thoughtful design features. These include an OEM-style drain plug and crush ring, eliminating the need to search for specialty washer sizes. The upper flange surface is precision-machined for optimal hardware fitment. The pan includes a molded o-ring for the upper flange, facilitating easier installation and removal, and eliminates the need for silicone sealant during installation. Designed for use with the included OEM-style Viton dipstick o-rings, the pan also features a unique chamfer to simplify dipstick installation.