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A P Racing Vertical Dual Circuit Hydraulic Handbrake With Diff Release

When used with the correct CP5540 series master cylinder (not included) this professional dual master cylinder hydraulic handbrake operates two circuits at different pressures so it can either be used to operate front and rear brake circuits or as a handbrake and differential release. A spring is fitted to one of the cylinders to delay the increase in


A P Racing Vertical Dual Circuit Hydraulic Handbrake

This professional dual master cylinder hydraulic handbrake operates two circuits making it ideal for Group N rally use. It features a lightweight base and lever assembly. With a ratio of 7:1, this particular handbrake can be used as a locking or fly-off type. The master cylinder is mounted on ball bearings for a smooth operating action. Supplied without


A P Racing Universal Fluid Reservoir With Twin Outlets

A large capacity remote mount fluid reservoir with twin outlets to accept 8mm bore push on hose. An internal diaphragm is featured to help prevent moisture contaminating the fluid and the body had 2 through holes for mounting the reservoir to a bulkhead or panel.  Dimensions – 73mm Diameter x 102mm HVolume –

A P Racing Universal Fluid Reservoir With Mount

A compact universal remote mount fluid reservoir for use on hydraulic brake or clutch systems. The reservoir bottle is supplied with a heavy duty cable tie and nylon saddle to allow for universal mounting and the single outlet accepts an 8mm bore push on hose. Dimensions – 66mm Diameter x 96mm HVolume –

A P Racing Twin Bore Lever Type Proportioning Valve

AP Racing brake proportioning valves are designed for use in competition vehicles where it is desired to reduce the brake line pressure to compensate for varying road / track conditions. This twin bore valve has 2 inlet and 2 outlet ports which make it ideal for vehicles using the original master cylinder and twin brake lines, such as Group N. The valve


A P Racing Temperature Indication Strips

The handy temperature indication strips from A P Racing are designed for monitoring brake caliper temperatures but could be used to check temperatures on just about anything. The self-adhesive strips are simply attached to the item to be monitored and the highest temperature reached is shown on the strip after use. This is of particular use to check that

A P Racing Screw Type Proportioning Valve

AP Racing brake proportioning valves are designed for use in competition vehicles where it is desired to reduce the brake line pressure to compensate for varying road / track conditions. Fitting in line the valve offers no restriction when screwed in fully, but reduces pressure by approximately 33 percent when fully opened. The screw operation of the valve


A P Racing Radi-Cal R4 Brake Fluid

Radi-Cal R4 boasts the highest dry boiling point of any racing brake fluid currently available (340 deg C) and offers outstanding resistance to vapour lock / pedal fade under the most arduous of conditions. A higher vapour lock point means a firmer brake pedal at the extremes of brake temperature. Radi-Cal brake fluid has enhanced lubricity which increases

A P Racing Radi-Cal R3 Racing Brake Fluid (Was PRF660)

Radi-Cal R3 (formerly PRF660) from AP Racing is the ultimate high temperature racing brake fluid, featuring a dry boiling point of 320 degrees C which is higher than other leading brands. Radi-Cal R3 has advanced moisture resistant properties and low levels of viscosity for ease of bleeding. Radi-Cal R3 is suitable for all levels of motorsport where very

A P Racing Radi-Cal R2 Racing Brake Fluid (Was AP 600) – 500ml Bottle

AP Racing Radi-Cal R2 (Formerly 600) racing brake fluid is developed for racing applications where high temperatures are being experienced. With a dry boiling point exceeding 300 degrees C it is suitable for all forms of motorsport. Radi-Cal R2 brake fluid does not mix with other fluids so the braking system should be drained completely and purged with R2

A P Racing Radi-Cal R1 Racing Brake Fluid (Was AP 551)

Radi-Cal R1 racing brake fluid conforms to DOT 3 specifications and is suitable for motorsport use because of its high dry boiling point of 275 degrees C. Formally AP CP551 Supplied in 500ml

A P Racing Lever Type Proportioning Valve

AP Racing brake proportioning valves are designed for use in competition vehicles where it is desired to reduce the brake line pressure to compensate for varying road / track conditions. Fitted inline this lever type valve gives the driver 7 adjustment positions which are indicated by a positive location of the lever, meaning that adjustments can be made


A P Racing Formula Brake Fluid

AP Racing formula DOT 5.1 brake fluid is suitable for high performance road applications and is compatible with other fluids meeting the same standards. AP Racing formula is non silicone based fluid and has a dry boiling point of 275 degree Celsius but is also suitable for vehicles running in cold climates of  -40 degrees Celsius due to its superior

A P Racing Floor Mounted Twin Pedal Box

This floor mounted twin pedal box features a lightweight machined billet aluminium base and machined alloy billet pedal arms. The pedal foot pads can be adjusted to suit the driver’s needs, as can the clutch stop. A smooth pedal action is provided by ball bearing pivots which also increases efficiency. The pedal box is supplied with a Trunnion 14mm


A P Racing Floor Mounted Push Type Pedal Box Assembly

The A P Racing Floor Mounted Pedal Box Assemblies are designed to allow for 9 different footpad positions providing you with upmost comfort and adjustability. The Floor Mounted Pedal Boxes feature 3 different ratio adjustments for the brake and clutch pedals, allowing for sharp or progressive clutch engagement and brake application. The throttle pedal now


A P Racing Floor Mounted 3 Pedal Box

This 3 pedal floor mounted pedal box features a unique pull type design which allows the push rod of the master cylinders to remain in line, this removes all side loads and makes the CP5516 pedal box incredibly efficient. The master cylinders themselves are mounted in front of the pedals and under the driver’s feet in order to maximise the use of


A P Racing Double Ended Hand Brake Master Cylinder

A lightweight double ended hand brake master cylinder with a bore diameter of .70″ (17.8mm), designed for use with dual circuits where diagonal brake split is mandatory. CP6026 is mounted using rod ended spherical bearings. Features: Double ended hand brake Master Cylinder For use with dual circuits where diagonal brake split is mandatory Forged


A P Racing Diaphragm (Bellows) To Suit CP4709 Type Fluid Reservoir

A rubber diaphragm (bellows) to minimise the entry of dirt and moisture and to help prevent spillage. For use with medium and tall CP4709 Type fluid reservoirs

A P Racing Brake Calipers

These brake calipers from AP Racing have come about from over 50 years of experience at the highest levels of professional motorsport. As such there is a wide range of calipers to suit most applications from single seaters to GT and from Touring Cars to Rally Cars. All calipers are made from quality cast materials for added strength and are tested


A P Racing Balance Bar Remote Adjuster

This high quality remote adjuster is designed to fit to any brake balance bar with a 3/8 UNF thread. The panel mounted anodised alloy knob features 1/4 turn click stops to enable precise, vibration resistant adjustments. The cable has a 3.8mm inner which is more resistant to ‘wind up’ and is supplied as a 1200mm length. The end fitting is


A P Racing 2 Pedal Under Slung Pedal Box

This 2 pedal under slung pedal box from A P Racing is constructed from high quality materials and has a brake pedal which features a multi-ratio mounting bracket which allows for three different pedal ratios including 4.7:1, 5.4:1 and 6.25:1. This gives the driver to tailor the brake pedal feel and travel to their preferences. High efficiency push type


The Knowledge



Performance Brake upgrades

The braking system is the single greatest safety measure when on the road. The system is designed to use pressure and friction to force the car to a stop.
Vehicles have different types of braking systems but with the same mechanism. Various components are incorporated to form the complete system, and a failure in one can compromise the whole operation.
For this reason, vehicle owners have to provide proper maintenance to keep the brake system working. If a brake pad, hose or calliper is faulty, then it is necessary to replace it. A clear comprehension of how the different parts in the brake network are connected goes a long way when it comes to taking care of your car.

How a vehicle braking system works

Anything in motion has kinetic energy, which increases with the speed and weight of the object. To stop, you have to eliminate all that energy. An automotive braking system achieves this by converting it into heat. The system has a pedal, which is the contact point for the driver. When you step on this, a lever triggers the cylinder holding the brake fluid, which is deposited into the callipers. This movement forces the brake pads to engage, resulting in pressure that falls on the rotors thereby, generating friction that halts the vehicle. This hydraulic system is able to capitalise on the pressure from the foot and turn it into sufficient force to stop the car.

What are the differences between Brake Discs and Drum Brakes

Drum and disc braking mechanisms are the two types that are fitted into vehicles. Some automakers have disc braking on the front wheels and drum in the rear. Others have disc braking on all wheels. With a disc brake, the system contains a metal disc that is visible through the front wheels. This disc turns with every movement of the wheel. A calliper, hydraulic pistons and a pad are also included in the system. Pressing the brake pedal causes the calliper to apply pressure on the pad through the pistons. As this pad rubs against the disc, the friction allows the pistons to slow the disc by clamping on it. There are no return springs, so when you release the brake, the Pistons have to move a small distance to their original resting place. The pistons are also fitted with rubber rings that make it possible for them to slip forward over time to compensate for the wearing down of the pads. By doing this, the distance between the pads and the pistons remains consistent.

All Disc Braking Systems

An all-disc system is a common feature for performance car brakes and luxury vehicles due to their efficiency. For one, they dissipate heat better than a drum braking system. They also have a long lasting break fade. It means that they lose their effectiveness during hard stops at a slower rate than drum braking.

Drum Braking Systems

In a drum system, a drum and brake shoes work together to generate friction and slow down the car. The drum is hollow with two shoes fitted inside with a stationary backplate covering the back section. Hydraulic pistons in the wheel cylinder apply pressure to the shoes, forcing them outward. The curved shoes have friction linings that force against the drum when the shoes move outwards, causing it to stop. One end of a brake shoe has a pivot while the other has a piston. The shoes in a drum system are not always the same. There is the leading shoe, where the piston is at the leading edge. When the drum turns, the leading shoe makes contact and moves towards the drum, which improves braking. The other type is the trailing shoes, which has the pivot located at the front. A drum system can have leading and trailing shoes while others have a pair of leading shoes. With a twin-leading system, each shoe has a hydraulic cylinder while a leading-trailing design has a single cylinder. A leading and trailing combination is more powerful and is commonly used in the rear. Unlike a disc brake, a drum system has return springs that allow the shoes to bounce back when the driver releases the brakes. Drum braking systems are simpler in design than discs thus, making them cheaper to produce. A drum brake can be pneumatic, mechanic or hydraulic. The braking system of your vehicle has various threats to deal with, but heat is the most brutal. Pressing on brakes constantly, in addition to the hydraulic process that is necessary to generate friction, means that they get worn out over time. You can replace some of the components of the system such as the pedal, pads and pistons. Callipers need replacing when they start leaking. Piston seals can also suffer damage with prolonged use. Of course, the system relies on good quality brake fluid to facilitate the conversion of energy into heat. Brake rotors, calliper pins and brake shoes are other components that need regular inspections to ensure optimal performance.