Wilwood FNSL6R Front Big Brake Kit for Subaru WRX (2002–2021) & STI (2004–2021) – 13” Rotors – 6 Piston Calipers

Part Number
140-12874

Overview
The Wilwood FNSL6R Front Big Brake Kit (140-12874) is engineered for Subaru WRX and STI platforms requiring a balanced combination of performance, control, and thermal capacity. Designed to handle increased power and aggressive driving conditions, this system delivers strong stopping force, improved heat management, and consistent pedal response.

Featuring forged 6-piston calipers paired with 13-inch rotors, this front brake kit provides a significant upgrade over factory braking systems while maintaining excellent street and track usability.

Performance Tier
This is our mid-tier brake package, designed for enthusiasts seeking increased braking performance and consistency without stepping into a full motorsports-level system.

Features
FNSL6R forged 6-piston calipers for increased clamping force and even pad distribution
13.06-inch vented rotors for improved thermal capacity and braking leverage
Enhanced braking performance and modulation under load
Improved heat dissipation during repeated braking
Lightweight, performance-focused construction
Consistent pedal feel and response in demanding conditions

Configuration Options
Available in black or red caliper finishes to complement your build

Rotor configurations available in slotted or drilled and slotted designs, allowing you to tailor braking performance, cooling characteristics, and visual presentation

What’s Included
(2) Wilwood FNSL6R front 6-piston calipers
(2) 13" vented front rotors
(2) Aluminum rotor hats
(2) Caliper mounting brackets
Wilwood performance street compound brake pads
Stainless steel braided brake lines
Rotor-to-hat mounting hardware
Caliper mounting hardware (bolts, washers, spacers)
Brake line fittings and adapters
Installation hardware kit

Front kit only. Rear components not included.

Fitment
Subaru WRX & STI
2002–2021 WRX
2004–2021 STI

GC8 Compatibility
May fit 1993–2001 Subaru Impreza (GC8) when equipped with WRX or STI knuckles (spindles).
Fitment will vary depending on setup and configuration.

Fitment Notes
Designed for WRX/STI spindle geometry
17" wheels or larger required. Some wheel designs may not clear—test fitment recommended
Wheel clearance must be verified prior to installation
Professional installation recommended
Confirm fitment before purchase

Shipping & Availability
Ships directly from manufacturer. Processing and delivery times may vary based on manufacturer availability and production schedule.