Courtenay Sport Brakes

Courtenay Sport have joined forces with leading brake manufacturers, to design a range of uprated brakes that will provide optimum performance without warping. They are effective from cold, don't squeal at low speeds and stay fade free at very high temperatures, ideal for all fast road and track day applications.

(Prices are correct at time of publishing, but may be subject to change without notice. If your vehicle is not listed please ask. E&OE)

All our brake discs can be supplied by mail order or fitted in our workshops. Please enquire for details.

288mm Disc Conversion. This kit contains a pair of 288mm discs (available in plain or with a 16 groove configuration) together with a pair of V6 brake calipers and fittings. This conversion enable owners of any front wheel drive Vauxhall/Opel with 4 stud wheel bolt pattern to have massive stopping power. (288mm is the same disc size as the V6 Vectra!)

Courtenay Sport's 322mm Brake upgrade kit suitable for 5 Stud Astra G/H and Zafira A/B. Huge increase in stopping ability which will sit neatly under 17" alloy wheels. This upgrade kit includes a pair of 322mm vented discs, pads, callipers and brackets finished in VXR blue.
322mm Brake Kit
Vauxhall Retail £849.69 Our Price £525.00 inc VAT
16 Groove Discs £75.00 extra - Shown Below
VXR Brakes Hoses Required for Astra G/Zafira A - £34.95

In response to some serious fast road and track day warriors, we teamed up with our friend Dave Peace to develop an Astra VXR 292mm Vented rear brake kit to compliment the large front brake kits already on the market.

With large front brakes the car nose dives and tries to grind the front splitter into the tarmac, whilst the rear of the car can become very light. The larger diameter rear discs even this out making the car flatter under braking.

For those people who track their car hard, the vented rear discs will be a big bonus as the factory ESP system works the rear brakes very hard during hard & high speed cornering, as the ESP remains partially active even when switched off via the sport button.

This kit has been developed and tested on both Dave’s and our own cars and is fitted to our own Astra Sprint, and has been tested on track and at the legendary Nürburgring Nordschleife. We have also got a kit running on an Astra VXR/OPC Race car in South Africa where overheating was a big issue!!

Here’s what you get.....

2 x 292mm Vented Rear Discs
2 x Calliper Carriers
2 x Calliper Bodies
2 x Billet CNC Machined Calliper Brackets
1 x Pad Set
2 x Anti Rattle Springs
4 x Caliper Mounting Bolts
4 x Stainless Steel Braided Hoses

Whilst this kit has been designed for Astra VXR, it will fit Astra G and H and Zafira A and B, providing suitable front brake upgrades have been carried out.

Price - £745.00 8G Discs - £75.00 extra with kit.

£2093.75 inclusive of VAT Fitted. Supply Only £1993.75

Due to the fact that a brake system is not perfectly sealed moisture can be absorbed by the fluid. This in effect reduces the boiling point of the fluid and can reduce the efficiency of the brake system. Another factor of reduced braking efficiency is fluid that has got too hot and boiled, turning it into gas which leads to a 'spongy' feeling.

Brake fluids are classified to defined specifications: DOT3, DOT4, DOT5, DOT 5.1 These sepcifications have two reference tests:
Dry Boiling Point, the boiling point of fresh fluid
Wet Boiling Point, the boiling point once the fluid has absorbed water, representing fluid that has been in use in a vehicle.

There are two main types of brake fluid:

DOT3, DOT4, DOT 5.1 which are glycol based (Poly Alkylene Glycol - PAG)
DOT 5 which is synthetic based.
The two types of fluid are not compatible and must not be mixed in a braking system.

Minimum Dry and Wet Boiling point specifications:

Slicone Brake Fluid (DOT5)
DOT5 was introduced to give higher temperature performance over DOT4. It will also not damage paintwork or absord moisture. However it is a poor lubricant and does not lubricate ABS pumps as well as PAG fluids and as it does not absorb water, any water in the system will remain as water droplets which can pool and cause corrosion or vaporise when heated under heavy braking causing severe braking efficiency loss.

PAG Brake Fluids (DOT3, 4 & 5.1)
DOT4 is the current mainstream brake fluid. DOT 5.1 has a higher specification and is intended for fast road and occasional track day use.

Racing brake fluid is usually designated DOT4 however it's performance exceeds that of DOT 5.1 fluid as shown in the above table.