Applicable models BMW E92-323i, E92-325i, E92-330i, E93-323i, E93-325i, E93-330i 181-00808 (SPORT) 181-00809 (COMFORT) Exhaust System E926NA Designed specifically for the BMW N52 engine. Considering the drive pattern such as high operating RPM range with less comorating sound, you can experience a racy high quality sound at high RPM range and acceleration. Twisted middle pipe stabilizes exhaust pulsation and contributes greatly to exhaust sound and performance. SPORT 　Sports model for maximum high quality exhaust sound at high rpm range. 　Not for vehicle inspection. COMFORT 　This model is compatible with vehicle inspections, and while utilizing the concept of the SPORT model, the low RPM range comforts the exhaust sound and clears the proximity exhaust noise. 　Vehicle inspection compliant. (Excluding vehicles registered after April 2010 and subject to acceleration noise) Proximity exhaust noise 92dB Layout Middle pipe, rear silencer Main pipe D=50mm x 2 (dual) D=70mm x 1 (single) Material: Stainless steel SUS436 Silencer Material: Stainless steel SUS304 Sub silencer x 1 Rear silencer x 1 Finisher D=80mm x 2 Standard: Stainless steel polished finish Options: Titanium/anodized finish (purple) available on a limited basis. 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.