HiSpecMonster4BrakeKit41.jpg Hi Spec - Vauxhall Astra H 360mm Monster 4 Conversion Kit £1,780.50 Incl. VAT£1,483.75 Excl. VAT
HiSpecMonster4BrakeKit41.jpg Hi Spec - Vauxhall Astra H 335mm Monster 6 Conversion Kit £1,773.00 Incl. VAT£1,477.50 Excl. VAT

Hi Spec – Vauxhall Astra H 360mm Monster 6 Conversion Kit

£1,863.00 Incl. VAT

Hi Spec 360mm front big brake conversion with 6-piston calipers built for the car in the title. Minimum wheel size 18in, a property of the kit rather than the car. Tell us your wheels and we will confirm clearance before you order.

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SKU: HIYZGBH242 Categories: ,
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Information:This Hi Spec Motorsport 360mm Monster 6 conversion kit will fit your Vauxhall Astra H. For those seeking more feel through their pedal, the Hi-Spec Monster 6 is the six piston version of the Monster 4 caliper. The pad is the same size but with up to 63% more piston area the Monster 6 really grips the disc. As with the Monster 4, the disc sizes range from 310mm to 360mm giving increased leverage, higher rotation speeds of the disc relative to the pad and more surface area to assist with heat dissipation – the stopping power is, in a word, "awesome".

What does a full conversion kit do? This full kit combines a Monster 6' 6-pot alloy caliper with large two-piece discs to give a significant increase in stopping power. The improved stopping power of the calipers joins forces with the greater leverage and heat dissipation properties to take braking performance into another league.

Fitting these alloy calipers and light weight one or two-piece discs has the added benefit of reducing unsprung weight. This is more important than just losing weight from the car. Losing unsprung weight means better handling and response from dampers.

What is a Monster-6 caliper? As its name suggests, the Monster 6 caliper is CNC machined from aerospace grade billet aluminium. The result is a super-rigid caliper with almost no flex, (a common problem with other alloy calipers). The Monster 6 features integral dust seals, internal fluid transfer galleries and a fully anodised finish in a choice of colours.

What's included? Everything that is listed below and the additional extras which can be picked from the menu above. We like to provide everything that is required for direct fitment with no messing about. We strongly recommend these kits as they are incredible value for money.

The Monster 6 Conversion includes:

  • 2 x Monster 6 calipers
  • 2 x Curved Vane Rotors
  • 2 x Aluminimum Bells
  • 1 x Bracket set
  • 1 x Bracket Hardware Pack
  • 1 x Rotor/Bell Hardware Pack
  • 1 x EBC Redstuff Pads (Upgradeable)
  • 1 x Dot 5.1 Brake Fluid
  • 2 x Braided Hoses

Wheel clearance: Designed to clear 18″ wheels. Before ordering please check your wheel clearances. HiSpec calipers are wider than the standard sliding caliper, therefore we cannot guarantee fitment for every wheel on the market.  You can check your clearances by checking that you have 60mm of clearance from the face of your existing disc to the back of your spokes.

 

Additional information

Weight 25 kg
Brand

Disc Diameter

Kit Tier

Caliper Pistons

Compatible Make

Axle

color

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Will it fit my car?
This kit is built for the car named in the listing, and the generation matters: hub design, hub bell shape, and caliper bracketry are car-specific even when the disc size looks the same. If your car is near a facelift year or an unusual variant, send us the registration and we will confirm the exact kit before you order.

Will it clear my wheels?
For this 360mm HiSpec kit, the minimum wheel diameter is 18in, and that figure belongs to the kit rather than the car, so it holds whatever you drive. Diameter is only half the story though: spoke depth is wheel-design-specific, so if you run aftermarket wheels with deep spokes, send us a photo and the wheel model and we will check clearance properly.

Do I need to upgrade the rear at the same time?
No. The front does the large majority of the braking, so a front kit alone is the normal first step and a balanced one. Upgrade the rear later if you want matched looks or you are building for sustained track work, and if the car has an electronic parking brake, read our guide on rear kits and electronic handbrakes before planning that side.

Which pad compound should I run?
It depends on use, not on the kit: fast road, track day, and race compounds behave very differently when cold and when worked hard. Our guide on brake pad compounds explains the choices for HiSpec kits in plain terms, and heading to a circuit, our track day brake prep guide covers pads, fluid, and bedding in.

What does the 6-piston caliper actually give me?
More pistons spread clamping pressure across a bigger pad more evenly, which improves pedal feel and pad wear rather than raw stopping power, and the bigger disc adds the leverage and heat capacity. The honest summary: consistency lap after lap, and a pedal you can modulate, not a party trick emergency stop.

In-store displays:​

Our showroom is primary for driver safety equipment. While visiting us to discuss your braking requirements, We can show you around our premium range of over 125 seats from brands including Bimarco, Cobra, Corbeau, Sparco, OMP, Recaro, GP-Race, OMP, and more.

Alongside this, we also stock and display HANS devices, harnesses, race-wear, race-suits, FIA helmets and various other safety equipment. If you are looking to visit us to see and try any particular seat or product, please contact us in advance and we’ll be happy to help.

In-Store appointments:

Due to the specialist nature of our services, we do ask that you please contact us in advance to book an appointment. We have multiple slots available each day including selected availability at the weekend.

Working by appointment allows us to dedicate our time with you and provide a personal and professional service. We’ll always ensure you leave with the right equipment for your needs.

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Guides and advice

GuideBig Brake Kits And Electronic Handbrakes: What Fits And What Does Not
GuideBrake Pad Compounds Explained: Choosing The Right Pad For Your Tarox Or HiSpec Kit
GuideGetting Your Brakes Ready For A Track Day: Pads, Fluid And Bedding In

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