Upgrading Your ST Mk8 Brakes for Track and Road Use: What You Need to Know

Mario's Wheel Repairs
15 February 2025
Upgrading ST Mk8 Brakes: Track & Road Use Guide

If you’re using your Ford Fiesta ST Mk8 for both daily driving and occasional track days, upgrading your braking system is a smart move to improve performance and reliability. After an intense track session, brake fade and increased wear can be common issues, making it essential to choose the right components to handle both track abuse and daily road use.

Brake Fade and Why It Happens

Brake fade occurs when excessive heat buildup reduces the effectiveness of the braking system. This can result in longer stopping distances and a spongy pedal feel. On track days, your brakes endure extreme temperatures, so upgrading to more heat-resistant components can help maintain consistent performance.

Choosing the Right Brake Setup

For a balanced combination of track and road use, EBC Brakes has recommended the following setup:

  • EBC Yellowstuff Pads (Front & Rear) – These offer a strong initial bite, good fade resistance, and work well from cold for daily use.
  • Black Diamond "Combi" Discs – High-quality discs with a noticeable reduction in pedal travel and improved braking efficiency.
  • Braided Brake Lines (All Round) – Improve pedal feel and braking efficiency by reducing expansion under pressure, which also contributes to less pedal travel.
  • High-Temperature DOT 4 or DOT 5 Fluid – Higher boiling points help prevent fluid vaporisation, reducing fade under extreme conditions.

Choosing the Right Brake Fluid: DOT 4 vs. DOT 5

DOT 4 – Suitable for most performance applications, has a high boiling point and is compatible with stock braking systems.

DOT 5 – A silicone-based fluid that is not compatible with DOT 4 systems and requires a full flush before use. It has a higher boiling point but may introduce a slightly spongier pedal feel.

Recommendation: For track and road use, high-performance DOT 4 or DOT 5.1 (not silicone-based DOT 5) is preferred, as they offer the best balance of performance and compatibility.

Installation Tips and Best Practices

While a full installation guide is beyond the scope of this article, here are some key tips to ensure a successful upgrade:

  • Proper Torque Specs – Always tighten caliper bolts and brake line fittings to manufacturer-specified torque values to prevent leaks or failure.
  • Brake Bleeding – After installing new lines or fluid, ensure proper brake bleeding to remove any air bubbles, which can cause a spongy pedal feel.
  • Break-In Process – New pads and discs require proper bedding-in (gradual heat cycling) to maximise longevity and performance.
  • Inspect for Clearance – Check braided lines to ensure they are not rubbing against suspension components.
  • Check Fluid Levels – After installation, monitor brake fluid levels and top up as necessary.

Do You Need Additional Brackets or Supports for Braided Lines?

One of the concerns when switching to braided brake lines is whether additional brackets or supports are required. Since braided lines are typically stiffer and more resistant to flexing compared to stock rubber lines, their routing and attachment points need to be carefully considered. Here’s what to check:

  1. OEM Mounting Points – The ST Mk8’s stock brake lines are routed with specific brackets and mounting points to prevent excess movement. Some aftermarket braided lines are designed to be direct replacements and fit existing brackets. Based on experience with earlier Fiesta models, the lines should attach to the same point on the MacPherson strut as the standard ones did.
  2. Extra Support Brackets (If Needed) – In some cases, aftermarket braided lines might be slightly different in length or routing, requiring additional supports to prevent contact with suspension components. If the new lines don’t align perfectly with stock mounting points, universal brake line brackets or rubber-coated P-clamps can be used to secure them. Avoid sharp bends or contact with moving parts, as this can lead to premature wear or brake line failure. Ensure that lines follow a natural, tension-free route. Some aftermarket kits come with additional hardware; check with the manufacturer or supplier for recommendations.
  3. Garage/Mechanic Consultation – Since your garage raised concerns about whether extra supports are required, it’s worth confirming with:
    • EBC Brakes or the supplier – They may have specific guidance on mounting these lines securely.
    • Other ST Mk8 Owners – Forums and online communities can provide real-world installation experiences.
    • Your Mechanic – If unsure, they can fabricate small brackets or use zip ties and P-clamps to keep the lines properly routed.

Final Thoughts: Ensuring a Solid Upgrade

A well-planned brake upgrade will enhance stopping power, reduce fade, and improve pedal feel for both daily and track use. By ensuring proper mounting of braided lines, using high-quality fluid, and following proper installation steps, you’ll maximise the reliability of your braking system. If in doubt, confirm with your garage before installation to avoid any fitment issues.

Have you upgraded your Fiesta ST Mk8 brakes for track use? Let us know your experience and any tips in the comments!