The Ultimate 2017 WRX STI Brembo Caliper Install Guide: Boost Your Braking Performance

For Subaru enthusiasts seeking professional-grade stopping power without the astronomical cost of aftermarket big brake kits, the 2017 wrx sti brembo caliper install represents the holy grail of upgrades. This comprehensive guide walks you through every step of the process, from sourcing parts to the critical breambo caliper bleeding procedure, ensuring your subaru brembo swap delivers track-ready performance with OEM reliability.

STI Brembo Compatibility: What Models Can Use This Upgrade?

The 2017 sti caliper install isn't limited to just WRX models. Many Subaru vehicles can benefit from this upgrade, though some require additional modifications. The most compatible models include:

• 2015+ WRX (non-STI)
• 2009-2014 Forester XT
• 2008-2014 Impreza GT
• BRZ/Toyota 86 (with appropriate adapters)
• Legacy GT (specific years)

One of the most common questions we hear is, "What other Subaru models can you install 2017 STI Brembo calipers on?" The answer depends largely on your wheel size, hub compatibility, and willingness to use adapter brackets. For most modern Subarus with 5x114.3 bolt patterns, the swap is remarkably straightforward.

Essential Parts List for a Successful Brembo Swap

Before beginning your subaru brake upgrade diy project, ensure you have all necessary components. A complete sti brembo brake upgrade requires:

• 2017 STI Brembo calipers (front and rear)
• STI Brembo brake rotors (326mm front, 316mm rear)
• Brembo-specific brake pads
• Brake line upgrade sti calipers (STI-specific lines or stainless steel braided lines)
• High-performance brake fluid for sti brembo (DOT 4 or DOT 5.1)
• Appropriate brembo caliper bracket if needed for your specific model
• Hardware kit (bolts, clips, shims)

When sourcing used calipers, inspect them thoroughly for piston damage, thread integrity, and overall condition. Rebuild kits are available if needed, but starting with quality components ensures a smoother 2017 wrx sti brembo caliper install process.

Tools You'll Need for the Installation

Proper tools make the difference between a frustrating weekend and a professional-quality installation. For this subaru brembo swap, you'll need:

• Jack and jack stands (safety first!)
• Torque wrench (critical for brake components)
• Socket set (10mm, 12mm, 14mm, 17mm, 19mm)
• Brake bleeder kit or vacuum pump
• Brake piston spreader tool
• Torx bit set (for certain caliper components)
• Brake cleaner and parts cleaner
• Shop towels and gloves

Step-by-Step Installation Process

Preparation and Safety

Begin by parking on a flat surface and engaging the parking brake. Loosen lug nuts before lifting the vehicle, then securely support it with jack stands. Never rely solely on a jack for support when working under a vehicle.

Removing Old Components

Remove the wheels and then disconnect the brake lines from the existing calipers. Have a container ready to catch brake fluid. Remove the caliper mounting bolts and carefully lift away the old calipers. Remove the old rotors, which may require loosening the set screw or gentle persuasion with a rubber mallet.

Installing New Brembo Components

Mount the new STI rotors, ensuring they seat properly on the hub. Install the 2017 STI Brembo calipers using the appropriate hardware. The torque spec for STI Brembo caliper bolts is critical: 72 ft-lbs for front caliper bracket bolts and 65 ft-lbs for caliper mounting bolts. Always consult factory specifications for your specific application.

Connect the brake lines, using new washers to prevent leaks. For optimal performance, consider upgrading to stainless steel braided lines during your sti brembo brake upgrade.

The Critical Brake Bleeding Procedure

Proper bleeding is the most important step in your 2017 wrx sti brembo caliper install. Air in the brake system compromises performance and safety. Follow this subaru brake bleeding order for best results:

1. Begin with the rear passenger side caliper
2. Move to the rear driver side caliper
3. Bleed the front passenger side caliper
4. Finish with the front driver side caliper

This sequence ensures all air is properly evacuated from the system. Use the recommended brake fluid for STI Brembo calipers - typically a high-temperature DOT 4 or DOT 5.1 fluid for performance applications.

The breambo caliper bleeding procedure requires two people: one to operate the brake pedal and another to open/close bleed valves. Alternatively, use a vacuum bleeder for a one-person operation. Continue bleeding until clean, bubble-free fluid emerges from each bleeder valve.

Proper Bedding Process for New Brembo Brakes

After your 2017 sti caliper install is complete and properly bled, the bedding brembo brakes process is essential for optimal performance. Bedding transfers an even layer of pad material onto the rotor surface, improving braking efficiency and preventing judder.

Follow this bedding procedure:

1. Find a safe, empty road with minimal traffic
2. Accelerate to 45 mph and apply moderate brake pressure to slow to 15 mph
3. Repeat this process 5-6 times without coming to a complete stop
4. After the last repetition, drive without braking for several minutes to cool the system
5. Avoid coming to a complete stop until brakes have cooled significantly

This process generates the heat necessary to properly condition both pads and rotors for optimal performance.

Common Issues and Troubleshooting

Even with careful installation, some issues may arise during a subaru brembo swap:

• Wheel clearance issues: STI Brembos require at least 17-inch wheels with specific spoke design and offset
• Brake bias changes: The larger STI calipers may affect front/rear balance, though most report minimal impact on ABS function
• Rubbing or noise: Ensure all components are properly torqued and that dust shields aren't contacting rotors
• Soft pedal feel: Usually indicates air in the system - rebleed following proper procedure

Frequently Asked Questions

What size wheels do you need to clear STI Brembo calipers?

Most 17-inch wheels will clear STI Brembos, but spoke design and offset are critical factors. Some 17-inch wheels require spacers, while 18-inch wheels typically provide ample clearance.

Is the Brembo swap on a WRX worth it?

Absolutely. The sti brembo brake upgrade provides significantly improved braking performance, better heat dissipation, and enhanced durability for track use or spirited driving, all at a fraction of the cost of aftermarket big brake kits.

Do you need to change the master cylinder for a Brembo swap?

For most modern Subarus, the stock master cylinder is sufficient. The STI and WRX use the same master cylinder in many model years, making the swap compatible without modification.

What is the difference between a Brembo swap and a full big brake kit?

A subaru brembo swap uses OEM STI components, offering proven reliability and often lower cost. Aftermarket big brake kits may offer larger rotors or more aggressive caliper designs but at significantly higher prices.

How much does a used set of STI Brembo calipers cost?

As of 2025, used front and rear STI Brembo calipers typically cost between $1,200 and $1,800 depending on condition, included components, and whether they're painted or powder-coated.