This Porsche 911 RSR or IROC style bumper is designed to fit 9" fenders or turbo width. It comes complete with a large oil cooler opening measuring 23 1/2"x 6 1/8" and brake cooling ducts that measure 10 1/2" deep and support a 3" hose. Average weight is 8 LBS. (Fits GT Racing Part #27 or stock turbo fenders) Note: GT Racing also recommends buying the grill Part #43C. Call for Carbon Fiber Pricing please.