These fender flares are the original design for the Porsche 911 turbo. The wheel arch has a slightly flatter surface than the earlier RSR Flare but is very similar. The flares also have a larger torsion bar opening for the turbo. Flares fit GT Racing turbo Rear bumpers (part #46, #158) or stock turbo bumpers and are sold in pairs. Average weight manufactured in fiberglass is 7 lbs per pair.