Description
Product Overview
Elevate your vehicle’s stopping power to professional levels with the Wilwood 140-14928-R SX6R Big Brake Kit. This comprehensive front brake system is engineered for drivers who demand superior braking performance for high-performance street driving, autocross, and track day events. The kit’s centerpiece is the massive 12.19-inch (309.6mm) rotors paired with Wilwood’s renowned Dynapro 6-piston calipers, delivering a significant increase in braking torque and fade resistance over stock systems.
The SX6R kit is a complete, ready-to-install solution that includes everything needed for a direct bolt-on installation. The forged Dynapro calipers are not only lightweight but also incredibly rigid, providing excellent pedal feel and modulation. The distinctive red powder coat finish adds a bold, professional look behind your wheels. Whether you’re pushing the limits on a circuit or need confidence during aggressive street driving, this kit provides the thermal capacity and clamping force to handle intense braking scenarios.
Designed for specific vehicle applications, this kit offers a perfect balance of brute stopping force, reduced unsprung weight, and modern reliability, making it one of the most popular choices for serious performance enthusiasts.
📚 Performance Braking Resources
Technical Specifications
| Specification Category | Detail |
|---|---|
| Manufacturer Part Number | 140-14928-R |
| Kit Type | Front Big Brake Kit |
| Caliper Model | Forged Dynapro 6-Piston |
| Caliper Finish | Red Powder Coat |
| Piston Material | High-Temperature Phenolic |
| Rotor Diameter | 12.19 inch / 309.6 mm |
| Rotor Type | Directional Vane, Vented (Slotted Optional) |
| Rotor Thickness | 0.81 inch / 20.6 mm |
| Mounting Type | Bolt-On (Vehicle Specific) |
| Brake Pad Type | Wilwood Polymatrix Compound (Included) |
| Hardware Included | Yes (Bolts, Brackets, Stainless Lines) |
What’s Included
| Included | Not Included / Required Separately |
|---|---|
| ✓ (2) Forged Dynapro 6-Piston Calipers | ✗ Brake Fluid |
| ✓ (2) 12.19″ Vented Rotors | ✗ Wheel Bearings/Seals (if needed) |
| ✓ (1 Set) Polymatrix Brake Pads | �Aftermarket Wheels (Check Clearance) |
| ✓ (2) Stainless Steel Brake Lines | |
| ✓ Mounting Brackets & Hardware | |
| ✓ Detailed Installation Instructions |
🛠️ Recommended for a Complete Brake Upgrade
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Brake Fluid: Wilwood EXP 600 Plus High-Temp Brake Fluid
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Rear Brakes: Wilwood Rear Brake Upgrade Kit
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Master Cylinder: Wilwood High-Volume Master Cylinder
Comparison Table: SX6R Kit vs. Stock Brakes
| Feature | Wilwood SX6R Big Brake Kit | OEM Stock Brakes |
|---|---|---|
| Stopping Power | Exceptional (High Braking Torque) | Adequate for Normal Driving |
| Fade Resistance | Excellent (Large Thermal Mass) | Moderate (Prone to Fade) |
| Caliper Rigidity | Forged Construction (Minimal Flex) | Cast Iron (More Flex) |
| Pedal Feel | Firm, Linear, Excellent Modulation | Softer, More Travel |
| Unsprung Weight | Lighter than Many OEM Systems | Heavier |
| Ideal Use | Performance Street, Track, Autocross | Daily Driving, Commuting |
Frequently Asked Questions (FAQs)
Q1: Will this kit fit inside my stock wheels?
A: Big brake kits require significant wheel clearance. While the SX6R is designed to be as compact as possible, it will not fit most factory wheels. You will likely need aftermarket wheels with a large inner barrel diameter and specific spoke design. Always verify wheel clearance specifications before purchasing.
Q2: What is the benefit of 6-piston calipers over 4-piston?
A: Six-piston calipers allow for a larger total piston area, which increases clamping force. More importantly, they distribute the clamping force more evenly across the brake pad, reducing taper wear and improving pad life and consistency under extreme heat.
Q3: Are these brakes suitable for daily driving?
A: Yes, the included Polymatrix compound is an excellent street pad with good cold bite and low noise. However, they are a performance-oriented system, and brake dust may be more significant than with OEM pads.
Q4: Do I need to upgrade my master cylinder or brake booster?
A: For most vehicles, the stock master cylinder and booster work well with this kit. The pedal feel may be slightly firmer. If you experience a long or mushy pedal, it may indicate a need for a master cylinder with a larger bore size to move more fluid volume.
Q5: What is the proper bed-in procedure for these brakes?
A: A proper bed-in is critical for performance and longevity.
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Make 5-6 moderate stops from 35 mph, allowing for cooling in between.
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Then, make 5-6 aggressive stops from 45-50 mph, again allowing for cooling.
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Avoid coming to a complete stop until the brakes have cooled completely.
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Do not bed-in brakes on public roads with other traffic.
Internal Link: For a detailed step-by-step guide, see our Performance Brake Bed-In Procedure.
Pros and Cons
| Pros | Cons |
|---|---|
| Massive Stopping Power: Significant upgrade over OEM braking performance. | Wheel Fitment Challenge: Will not clear many factory wheels. |
| Excellent Fade Resistance: Large rotors dissipate heat effectively for track use. | Higher Cost: Significant investment over stock replacement parts. |
| Superior Pedal Feel: Firm, linear pedal provides excellent modulation and control. | Potential Pad Noise: Performance pads can be noisier than OEM street pads. |
| Reduced Unsprung Weight: Lightweight components improve suspension response. | Increased Brake Dust: Performance pads typically produce more dust. |
| Complete Kit: Includes everything needed for a professional installation. | Professional Installation Recommended: Requires precision and bleeding expertise. |
Conclusion & Ideal Use Case
The Wilwood 140-14928-R SX6R Big Brake Kit is a top-tier solution for enthusiasts who have outgrown their stock braking system. It is engineered to provide the thermal capacity, clamping force, and reliability needed for serious performance driving.
This brake kit is perfectly suited for:
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High-Performance Street Cars
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Track Day and HPDE Vehicles
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Autocross and Time Attack Cars
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Heavy Vehicles or Cars with Significant Power Adders
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Any application where brake fade is a concern
If your goal is to match your car’s acceleration with equally impressive stopping power, the Wilwood SX6R kit delivers proven, race-bred technology in a bolt-on package.
🔗 Official Technical Resource
For specific vehicle applications, detailed installation instructions, and rotor options, always refer to the Wilwood Engineering Application Guide for the most accurate and up-to-date information.
