Applicable models BMW F30-320i Sedan (N20 Engine) BMW F32-420i Coupe (N20 Engine ) BMW F36-420i Gran Coupe (N20 Engine) * Only F36 Gran Coupe cannot be equipped with sunroof. 181-00814 Exhaust System F304tb This is a vehicle inspection compliant exhaust that can be installed on the N20 engine. It has been developed to provide turbo power up to high rpm range and is also compatible with increased boost pressure. It features equal length pipe layouts on the left and right sides and a chamber in the middle of them to sport as much performance and exhaust sound as possible within the vehicle inspection compliant range. Stock rear diffuser Required for AH3 or 435i. ( Can be installed without modification) Layout 　Middle pipe, rear silencer Main pipe D=60mm x1 (Dual) Material: Stainless steel SUS436 Silencer Material: Stainless steel SUS304 Middle silencer x1 Rear silencer x2, chamber x1 Finisher D=90mm x2 Made of Titanium / (Purple) anodized finish Made of Titanium / (Silver) polished finish ( Discontinued) COMFORT Vehicle Inspection Compliant Proximity Exhaust Noise Left 88dB Right 87dB Acceleration Driving Noise 81dB (Certified ) Note on ordering This product is shipped in the order it is ordered, so it may not be able to be shipped immediately even if it is ordered, since it can be ordered even while the product is out of stock. Please feel free to inquire about the delivery date and waiting order.