74 and on Porsche 911 RS fiberglass rear bumper. One piece construction. Hand laid 17 08 biaxial fiberglass weave, strong yet light (avg weight 5 lbs). May have to notch bumper depending on muffler tip setup. Professional installation required. When purchasing the front and rear RS bumpers you get the splitter at no cost. Many other fiberglass parts available for Porsche 911,924,944. Boxster fiberglass parts coming soon. We ship worldwide.