That�s right; BBS FI-R Wheels in 991 Porsche Turbo S fitment are�always IN STOCK at! Minimum mass, maximum stability: The essence of what sports car drivers want is now available on our shelves for immediate delivery in the forged BBS FI-R wheel. The FI-R wheel with T�V certificate is firstly available for Porsche 991 GT3 (centerlock) as well as for the BMW F80 M3/ F82 M4. With finishes available in platinum silver and satin black as well as polished ceramic as an option, these wheels are offered in the following dimensions: 20x9, 20x9.5, and 20x12. An FI-R wheel for the Porsche 991 GT3, mounted on the front axle in the dimension 9 x 20 inches, weighs in at just around 7.9 kilograms. The counterpart in 12 x 20 inches for the rear axle weighs only 9.2 kilograms with a wheel load of 620 kilograms. Forging Technology Forging is a non-cutting forming process for material in a heated, solid condition. In order to generate the highest degree of material density and weight reduction at top performance from BBS� high-strength and durable aluminum or magnesium alloys, they are further enhanced in a complex forging process. This entails placing the heated star hub or the entire wheel blank in a press and compressing it in several work steps at 5000 to 8000 tons of closing pressure to further increase the density of the material in a special form known as a matrix. In between the individual work steps, the blank is repeatedly heated to approx. 400 degrees centigrade (752�F). As a result an optimal material structure is achieved particularly at the areas of high strain, the wheel can be dimensioned smaller, and is thereby lighter in weight. 100% Weight Optimized Because the spokes are back-milled, the optimal ratio between weight and stability is achieved for a light alloy wheel. This is achieved using a special CNC milling process, where the lateral parts that hold the wheel spokes are not relevant for stability, and are removed to reduce the weight of the wheel�s rotating mass. Applications:�2013-2015 Porsche Turbo S (991-chassis) Part Numbers / Pricing (per wheel) bbsFI133BS : Front BBS FI-R 20x9 Center Lock ET52 CB84 Satin Black Wheel JCERacing Price Shipped: $2,160.00 bbsFI142BS : Front BBS FI-R 20x9.5 Center Lock ET50 CB84 Satin Black Wheel JCERacin Price Shipped: $2,260.00 bbsFI134BS : Rear BBS FI-R 20x12 Center Lock ET44 CB84 Satin Black Wheel JCERacing Price Shipped: $2,310.00