The TK2 is Felt's high spec track bike, designed for professional level competition use.
The Felt custom-formed, double butted aluminium tubeset is built to provide maximum stiffness under acceleration and features an oversized & ovalized downtube, a flared top tube, an aero cut-away seat tube, and razor-like seatstays & wishbone.
Horizontal dropouts provide single-speed chain adjustment while the Felt straight-blade track fork provides responsive control.

Last of the 2006 models, now available in the 56cm size at a special clearance price. Could be one way to improve your velodrome PB....