Skip to navigation Skip to content

Your Basket

Call Garreth, Cameron and Jack: 0115 9893488

Free UK shipping on all orders over £100.00

Guides | Established 2003

Products search

Find parts for your car

UK Find parts by number plate

My Account
Contact Us
Help
Garage
Checkout

£0.00£0.00 0

Products search

Vehicle Selector
Bespoke Discs
Brembo Brakes
Hi Spec Brakes
TAROX Brake Kits
- Front Brake Kits
  Sport Kits
  
  Super Sport Kits
  
  Sport Compact Kits
  
  Grande Sport Kits
- More TAROX
  Rear Big Disc Upgrades
  
  Rear Caliper Kits
K Sport Brake Kits
Driver Help

Your garage NewAdd your car and see the parts that fit

Useful Links

Vehicle SelectorFind brakes for your car Driver HelpGuides and fitting advice Bespoke DiscsBuild your own, priced instantly

Your Account

Account Orders Wishlist

Talk to us

Garreth, Cameron & Jack · Mon to Fri

Call 0115 989 3488Free advice on your build

Name Email or phone How can we help?

Thanks, that’s with us. We reply the same working day.

That didn’t send. Please give us a call instead.

Quick Access

My Account
My Orders
My Wishlist

Want to chat?

Call Garreth, Cameron and Jack
0115 989 3488

Social

£0.00£0.00 0

Bespoke discs, priced as you build. Build yours

Visit our 2,500 sq ft showroom. Plan a visit

Big brake kits for your car. Vehicle selector

Search by number plate. Find parts

Add your car to your garage. Open your garage

Brake questions answered. Driver help

Free UK delivery over £100

Check your number plate for parts that fit

Klarna available at checkout

Bespoke brake discs, priced as you build

Established 2003, Nottingham showroom

Call the team: 0115 989 3488

Home / Product Disc Diameter / 300mm / Page 4

300mm

See which of these fit your car Enter your reg and we will mark every part that fits it.

UK Your number plate

Showing 37–48 of 170 results

←
1
2
3
4
5
6
7
…
13
14
15
→

Save
UK Engineered

Hi Spec 300mm Billet 4 Conversion kits, Ford Granada MK2 Brake Kits

Hi Spec – Granada Mk2 300mm Billet 4 Conversion Kit
£1,464.00 Incl. VAT£1,220.00 Excl. VAT
PayPal CreditFinance available
Select options
Save
UK Engineered

Hi Spec 300mm Billet 4 Conversion kits, Honda Civic Brake Kits

Hi Spec – Honda Civic EK 300mm Billet 4 Conversion Kit
£1,464.00 Incl. VAT£1,220.00 Excl. VAT
PayPal CreditFinance available
Select options
Save
UK Engineered

Hi Spec 300mm Billet 4 Conversion kits, Honda CRX Brake Kits

Hi Spec – Honda CRX 242 300mm Billet 4 Conversion Kit
£1,464.00 Incl. VAT£1,220.00 Excl. VAT
PayPal CreditFinance available
Select options
Save
UK Engineered

Hi Spec 300mm Billet 4 Conversion kits, Honda CRX Brake Kits

Hi Spec – Honda CRX 262 300mm Billet 4 Conversion Kit
£1,464.00 Incl. VAT£1,220.00 Excl. VAT
PayPal CreditFinance available
Select options
Save
UK Engineered

Hi Spec 300mm Billet 4 Conversion kits, Honda S2000 Brake Kits

Hi Spec – Honda S2000 300mm Billet 4 Conversion Kit
£1,464.00 Incl. VAT£1,220.00 Excl. VAT
PayPal CreditFinance available
Select options
Save

Hi Spec Road Car Rear Big Brake kits, Honda S2000 Brake Kits

Hi Spec – Honda S2000 300mm Ultralite 2 Rear Brake Conversion Kit
£815.50 Incl. VAT£679.58 Excl. VAT
PayPal CreditFinance available
Select options
Save
UK Engineered

Hi Spec 315mm Monster 4 Conversion kits, Hi Spec Road Car Front Big Brake kits, Jaguar XJ40 Brake Kits

Hi Spec – Jaguar XJ40 300/32mm Monster 4 2P Conversion Kit
£1,410.41 Incl. VAT£1,175.34 Excl. VAT
PayPal CreditFinance available
Add to basket
Save
UK Engineered

Hi Spec 300mm Billet 4 Conversion kits, Jaguar Brake Kits

Hi Spec – Jaguar XJ6 300mm Billet 4 Conversion Kit
£1,464.00 Incl. VAT£1,220.00 Excl. VAT
PayPal CreditFinance available
Select options
Save
UK Engineered

Hi Spec 300mm Billet 4 Conversion kits, Lotus Elan S1 Brake Kits

Hi Spec – lotus Elan S1 300mm Billet 4 Conversion Kit
£1,464.00 Incl. VAT£1,220.00 Excl. VAT
PayPal CreditFinance available
Select options
Save
UK Engineered

Hi Spec 300mm R114-4 Conversion kits, Lotus Elan S1 Brake Kits

Hi Spec – Lotus Elan S1 300mm R1 14-4 Conversion Kit
£1,360.98 Incl. VAT£1,134.15 Excl. VAT
PayPal CreditFinance available
Select options
Save
UK Engineered

Hi Spec 300mm Billet 4 Conversion kits, Lotus Elan S2 Brake Kits

Hi Spec – lotus Elan S2 300mm Billet 4 Conversion Kit
£1,464.00 Incl. VAT£1,220.00 Excl. VAT
PayPal CreditFinance available
Select options
Save
UK Engineered

Hi Spec 300mm R114-4 Conversion kits, Lotus Elan S2 Brake Kits

Hi Spec – Lotus Elan S2 300mm R1 14-4 Conversion Kit
£1,360.98 Incl. VAT£1,134.15 Excl. VAT
PayPal CreditFinance available
Select options

Showing 37–48 of 170 results

←
1
2
3
4
5
6
7
…
13
14
15
→

Refine Search

Price

Min price–Max price

CategorySearch Category

Brand

Caliper Pistons

Colour

Compatible Make

Disc Diameter

Kit Tier

Product categories

Store Information

Our showroom is by appointment
Phone: +44 (0)115 9893488
In-Store Hours: Monday – Friday: 10.00am to 4.00pm

About Us

Company
Privacy Policy
Contact Us
Vehicle guides
Terms and Conditions

Customer Care

Your garage and kit bag
Payment & Klarna
Delivery Information
Returns & Exchanges
Terms & Conditions
Security & Privacy
Free Gift & RC Cars

GSM Hub

GSM Racewear
GSM Sport Seats
GSM Big Brakes
GSM On eBay

Follow

Facebook
Twitter
Instagram
Pinterest
Youtube
Tiktok

20+ Years Of Happy Customers

Loading reviews...

Newsletter

Deals and new kit, every Friday.

© Copyright 2026 GSM Performance | All rights reserved.
Company Number 09256002 | VAT Number: GB232433833

Website built and maintained by Flying Penguin.

Privacy policy