Custom Brake Caliper Kit: GT6 Front, Integrated EPB Rear

What custom means on this page

The phrase custom brake caliper kit covers more ground in this trade than it should. A search for it returns rebuild services, painting shops and custom-finish programs next to real packages, because “custom” often means a chosen colour or a refinished body. On this page the word carries the other meaning: the vehicle is measured first, and the rotor hats, caliper brackets and hoses are made to those figures rather than picked from a shelf.

Front and rear are two different products: GT6 and integrated EPB

The front caliper is a GT6 hydraulic six-piston body. A six-piston caliper of this shape is a fixed caliper, meaning the body does not slide: it carries opposing pistons and clamps the disc from both sides at once, which is the design the caliper reference describes as it traces the move from single-piston units to two-, four- and six-piston items.

The rear caliper is a different animal. It carries an electric parking brake built into the body. A caliper-integrated EPB – the arrangement where the parking brake motor sits on the rear caliper itself – is one of the two production mechanisms described in the electronic parking brake reference, alongside cable-puller systems, and in that arrangement the pads are applied by an actuator driven from a control unit. That is why the rear half of this kit cannot be treated as a smaller copy of the front half.

That difference is also a rule on this record. The GT6 configuration is quoted for the front axle, and a car that wants the parking brake kept on the rear needs the integrated EPB configuration there rather than a front caliper moved to the back.

What the file has to contain

Both axles are quoted from the same file, so the list below is collected once and used for the front and the rear together.

Wheel and rotor screening ranges

What one set carries

Our product strip describes one set as 4 calipers, 8 brake pads, 4 custom rotor hats and caliper brackets, 4 hoses and 4 rotors, with fluid according to the selected model. Read against the two configurations above, that is a front pair and a rear pair, priced as one package.

Caliper bodies, hats and brackets follow the site material record at 7050 aluminium alloy, and the discs are listed as high-carbon cast iron. A rotor hat – the alloy centre bolted between the disc ring and the hub – is machined from the figures in the file rather than chosen from a list. A front and rear package cannot be described by one weight either, and this record proves the point: the strip prints 95KG while the specification table prints 45 kg, so the carton is quoted at 45 x 45 x 45 cm and the confirmed weight travels with the quotation instead.

What this page will not claim

No OE, OEM or interchange number is published for this package, because a set made to measured data is not a factory part with a factory number. GT6 is used as the caliper-family label the aftermarket applies to this six-piston body, not as a supplier name, a licence or a factory warranty.

No stopping distance, brake bias or temperature figure is published either, since no test file exists for any of these configurations. And four functions sit outside what a VIN or a wheel size can prove: compatibility with ABS, EBD and ESP, the master cylinder, and the balance between the two axles. The record asks for those to be reviewed car by car, and this page repeats the limit rather than implying a kit settles them.

Design references come from the caliper and electronic parking brake records linked above, which describe hardware types rather than this package. The vehicle data on this page was reviewed by the SteedLuxParts fitment desk on 2026-09-23 against the seller record and those references.

How a custom set is quoted

Cover lasts 5 years and applies to manufacturing and quality faults, with nothing else included. Wear, incorrect fitting and unauthorised changes are excluded, and any claim runs through the written policy rather than this page.

Questions that arrive before a custom order

After fitting, and the reference images

Three reference images sit below: the four-caliper package on a white background, the same package laid out with the rear actuators visible, and a close-up of one rear caliper and its connector. None of them is a fitment record for a particular car.

Send the vehicle and VIN, the axle wanted, the wheel diameter, width and offset, the PCD and centre bore, the inner barrel and spoke measurements, the current rotor diameter and thickness, photographs of the original caliper, hub and mounting points, and the EPB connector and actuator photographs for rear work. We reply with the approved rows, the hat and bracket position, and the price for the set.