Notice :.Specifications :Color : Glossy BlackMaterial : High ABS PlasticAttachment Method : ScrewsPlace on Vehicle : Rear,LowerManufacture Type : Aftermarket ProductFitment : For BMW 3 Series F30/ F31 M Sport 2012-2018Note : For M sport version only Package Includes :1pcs/set Single Side Dual Exhaust Rear Bumper Diffuser LipFeatures :- and high .-According to the original factory specifications.-Gives your vehicle a 0style and appearance.-Perfect cover that is useful, flexibility and so practical.-No Modification or Cutting Required.Note :1. The diffuser is modified part and not match. Mind it please don't order, thanks. (1inch=2.54cm)2. No installation instruction included, professional installation is highly recommended Important Notice : all of our products are required to be installed in professional Modification car shop , NOT every car shop can make it ,Small install gap is Allowed