BMW Z4 Brembo Gran Turismo Brake Kit with 4 Piston 320x28 Disc & 2-Piece Rotor - Front - 1Fx.6001A

Brembo Gran Turismo Brake System
This line is dedicated to the most demanding customers.This braking system originates from the Racing components, consisting of a ventilated, integral or composite disc, available drilled or slotted, 4, 6 and 8 piston aluminium calipers, a complete set of high performance brake pads, metal braid tubes and high quality small parts.

Please remember that in the European Community, Gran Turismo products may only be used in racing and on private roads, unless you have obtained a new approval in compliance with directive 98/12/EC.

High Performance Friction Material:
Aggressive pads that provide the highest level of performance.

Cross-Drilled or Slotted Discs:
Clears gasses, cleans pads for better "bite".

Mounting Brackets and Assembly Hardware:
Aircraft quality included and pre-torqued specifications.

Stainless Steel Braided Brake Line:
DOT/TUV approved.

Floating Disc Mounting System with Billet Aluminium Hat:
Reduce "Unsprung Weight" for better handling and reduces heat-related stress; increases brake performance and pedal feel.

Four, Six or Eight Piston Cast Aluminium Calipers:
Provide maximum braking force without the flex of sliding calipers.

Comparison between floating 2-piece and 1-piece discs
The floating disc mounting system, due to the aluminium alloy hat, reduces the "unsprung" weight for better handling and reduces heat-related stress: the mounting system is designed to allow a specific amount of float in both radial and axial directions. Brembo has engineered special springs that are used on every other fastener in order to slightly preload the assembly. This has been done to prevent excessive noise from the system during street use. The one-piece discs (both for the Sport and GT lines) are specifically designed in the goose-neck area to minimize thermal distortion and thus disc warping under severe use conditions. The one-piece discs provide excellent stopping power ranging from everyday traffic conditions to more spirited high performance driving, and fit into the budget of any enthusiast.

Ventilation gap:
It is a popular misconception that the slots or drillings in a disc determinate the direction of rotation. In truth, for an internally vented disc, the geometry of the vanes dictates the direction of rotation.

There are 3 different ventilation types in use:

• Straight vanes

• Curved vanes

• Pillars

The straight vanes and the pillars are non-directional, and can be used on either side of the vehicle. The curved vane disc, however, is directional. A curved vane disc must be installed with the vanes running back from the inside to the outside diameters in the direction of rotation. Orienting the disc in this manner, creates a centrifugal pump. The rotation of the disc causes air to be pumped from the center of the disc, through the vanes, and out through the outside diameter of the disc. This enhances the disc�s ability to dissipate heat. On some OEM applications, this standard is not satisfied: the use of directional discs means to manage two codes (left and right) per axle with some extra cost therefore it happens that a car manufacturer can use the same disc with curved vanes on both sides, losing part of the benefit in balance with lower costs.