Its called Hotcam cause it has the shape of a camshaft. This design gives more groundclearance, and is more aerodynamic than the oval exhausts. The quality of the Carbon is outstanding, as well as the entire finish of the can. Its guaranteed that it will not discolor. I've seen carbon exhaust from Laser which were a year and a half old, and the carbon looked like new.
Weight is phenomenal.
Just like with Twobros you have to cut off the pipe above the flange, which saves an extra 184 grams. In the case of my Kawa this meant 4 cm more inward and 4 cm higher than standard. The sound, I just am in love with it. Its like the beast has awakened. Its a deep and full sound.