this is your lucky day (that i recognized the exhaust from a british magazine feature). www.racetaylormade.com

it's a Taylormade CCT Racing Exhaust. the CCT stands for "cool ceramic technology", it's supposed to be pretty cool under the seat. the article compares a yoshi can and the CCT underseat can. the yoshi runs at 270 degrees (fahrenheit), while the CCT can runs at 73 degrees (so the outside tempature will actually be hotter). it's designed for power, which the cool temp is supposed to help with. cool system, $1250 for the full system, not a bad price.