Jaspher, Its true for X-Force twin loop. We cannot be 100% sure in regards to the X3 Ebay one. All of the twin loops on this forum are made by X force a local Australian manufacturer. Good luck and let us know how you go Jaspher Cheers, Gazoom You might be correct. My twin loop from X3 is a little different than what's described about the x-force. I put on the twin loop yesterday. I like how it looks on the car. The noise is actually a bit louder than I expected. At Idle it puts out a deep tone and when cruising the exhaust is actually quieter. Under hard accelleration the sound is really nice. The pitch gets higher as the RPM rises. I love the way it sounds under hard accelleration. Overall I am somewhat satisfied. Idle noise can be a little lower but I can get use to it. I will try to take some pics and record some sound clips this week.