This bumper is designed to be used with 9" front fenders or turbo width(GT Racing Part #30B). The oil cooler opening measures 23 1/2" x 6 1/8" and includes brake cooling ducts, splitter, and provisions for lights are built in. Includes mounting hardware. Average weight is 9 lbs. Note: GT Racing also recommends buying the grill (part #43C). Call for carbon fiber prices.