NEUSPEED 2-Piece Full-Floating Brake Rotors, direct replacement for factory 340x30mm rotor. 

Only the highest quality materials and incorporating the latest racing brake rotor technology went into building these rotors. The 2-Piece Full-Floating Rotor offers the advantage of weight savings and quicker heat dissipation. Plus, the reduction of unsprung weight improves handling characteristics under all situations, and this reduction in rotational inertia allows for faster acceleration, decreased braking distances, and more responsive handling.

Benefits of Full-Floating Rotor:

This design allows the disc to "float" in radial and axial directions, enabling the disc to expand and contract according to temperature variations for better braking performance. Allowing the outer disc to expand away from the hub under extreme heat reduces the tendency of the rotor warping.

Note - GTI Owners

Own a GTI and are unsure if you have Performance Pack brakes? If your GTI brakes look like the photo below you have the Performance Pack brakes. The biggest indicator is the "GTI" on the calipers.