BMW S63 Downpipes | V8 BMW X5 M and X6 M by BMW tuner, Active Autowerke

***Before your order ships you MUST ensure that your customer signs and returns the Race Use Only Waiver sample available HERE. If you want to send us a copy, please email, fax or take a photo of the completed form. You can email it to your sales rep or to info@activeautowerke.com and you can fax it to us at (305) 253-8921*** IN STOCK NOW - CONTACT ONE OF OUR RACE DEALERS TO PURCHASE Active Autowerke is proud to bring you our hand made Signature S63 Downpipes for the twin-turbo V8 BMW X5 M and X6 M models.u00a0 A turbo impeller wheel speed is mostly limited by the exhaust back pressure within the system. If one could eliminate some or most of this exhaust back pressure, the turbo will spool that much faster and effortlessly resulting in quicker engine revs and increased HP. The Active Autowerke Signature down pipesu00a0are designed with the intent to maximize power. These down pipes are created with the least amount of restrictions possible by utilizing a full 3" piping throughout with