Project Mu FS44 4POT Front BBK 355x32mm for 2013+ FRS/BRZ/86 2022+ BRZ/GR86
Regular price
$3,695.00
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OVERVIEW
Achieve maximum front axle clamping force and high-temperature thermal durability with the Project Mu 4POT FS44 Forged Front Caliper Kit for the 2022+ Toyota GR86, Subaru BRZ, and 2013-2021 Toyota 86. Featuring Project Mu's standard full-width forged aluminum body housing oversized 41mm pistons, the FS44 system uses an advanced 4-piston x 4-pad architecture. By driving 4 individual pads per caliper (1 pad per piston), the kit synchronizes pad contact to eliminate pad tapering, deliver linear pedal feel, and optimize heat distribution across the brake face. Combined with extra-thick 355mm x 32mm 2-piece straight 8-slit floating rotors, this kit is built to withstand extreme track day abuse and high-speed deceleration without brake fade.
| Caliper Feature / Spec | FS4M Street 4POT | FS44S Slim 4POT | FS44 Full-Size 4POT | FS6 Flagship 6POT |
|---|---|---|---|---|
| Axle Position | Front Axle Specific | Front Axle Specific | Front Axle Specific | Front Axle Specific |
| Caliper Profile & Width | Compact Street Body (17" Wheel Friendly) | Slim Body (140.2mm Width - High Spoke Clearance) | Standard Full Body (156.25mm Width - Heavy Duty) | Large 6-Piston Forged Body |
| Piston Diameter / Pad Layout | 4-Pistons x 2-Pads (Standard) | 38mm Pistons x 4 (4-Pads per Caliper) | 41mm Oversized Pistons x 4 (4-Pads per Caliper) | 6-Pistons x 2 Large Pads |
| Rotor Specs & Thickness | 315mm x 30mm (1-Piece Round 6-Slit) | 355mm x 28mm (2-Piece Straight 8-Slit) | 355mm x 32mm Heavy-Duty (2-Piece Straight 8-Slit) | 355mm x 32mm or 380mm x 32mm (2-Piece) |
| Target Application | Street Upgrade / Fits OEM 17" Wheels | Street & Track with Tight Wheel Clearance | Heavy-Duty Circuit / Maximum Heat Mass Track Day | Extreme Circuit & Dedicated Race Build |
FEATURES
- Full-Size Forged Caliper Architecture: 156.25mm overall width body structure provides maximum torsional rigidity under high hydraulic pressure.
- Oversized 41mm Pistons: Larger piston bore area generates increased overall clamping torque compared to slim body models.
- 4-Piston x 4-Pad System: Drives 4 individual pads per caliper to ensure even pad wear, eliminate thermal taper, and maximize initial bite response.
- Extra-Thick 355mm x 32mm 2-Piece Rotors: 32mm thick floating rotors offer maximum heat storage capacity to resist warping and rotor cracking under track stress.
- Straight 8-Slit Vents: 8-slit face pattern continuously cleans pad friction faces and exhausts out friction gases.
- Dust Seal Barrier System: Features dedicated outer dust seals positioned in front of the main oil seals to prevent debris, dust, and grime from damaging inner hydraulics.
WHAT IS INCLUDED
- 2x Project Mu FS44 Forged 4-Piston Front Calipers (Signature Teal Finish)
- 2x Project Mu 355mm x 32mm 2-Piece Front Brake Rotors (Straight 8-Slit)
- 8x Project Mu Performance Front Brake Pads (4 Pads per Caliper - Standard NS-C Compound)
- 2x CNC Machined Aluminum Caliper Mounting Brackets & Hardware
- 2x Stainless Steel Braided Brake Lines with Teflon Inner Core
- Pad Support Springs & Complete Installation Hardware
PART NUMBERS
- Manufacturer Part Number: FS44-F103B
SPECIFICATIONS
- Position: Front Axle
- Caliper Type: Forged Aluminum 4-Piston Standard Full Body (FS44)
- Piston Diameter: 41mm x 4
- Caliper Dimensions: Length: 282.8mm | Width: 156.25mm | Height: 72.3mm
- Rotor Dimensions: 355mm Diameter x 32mm Thickness (2-Piece Floating)
- Rotor Venting / Slits: Vented with Straight 8-Slit Pattern
- Standard Included Compound: Project Mu NS-C (Optional: TYPE PS or D1 spec ZERO)
- Finish: Hard Anodized + Signature Teal Powder Coat
FITMENT
- 2022+ Toyota GR86 (ZN8) - Requires 18-inch wheels or larger
- 2022+ Subaru BRZ (ZD8) - Requires 18-inch wheels or larger
- 2013-2021 Toyota 86 / Scion FR-S (ZN6) - Requires 18-inch wheels or larger
- 2013-2021 Subaru BRZ (ZC6) - Requires 18-inch wheels or larger
DISCLAIMER
- Backplate Processing Required: Installation requires trimming or modifying OEM front brake dust shields/backplates.
- Non-Affiliation & Warranty: Direct parallel import of authentic JDM components. We are an independent retailer, not an authorized Project Mu dealer. Factory warranty applies in Japan only.
- 14-Day Defect Window: Customers must inspect all parts upon arrival. Defect, damage, or missing part claims must be reported within 14 days of delivery and prior to installation. Installed items are non-returnable.
- Installation: Manuals are in Japanese. Professional installation by a certified technician is required.