{"product_id":"project-mu-fs44-4pot-front-bbk-345x32mm-zn6-zc6-zn8-zd8","title":"Project Mu FS44 4POT Front BBK 345x32mm for 2013+ FRS\/BRZ\/86 2022+ BRZ\/GR86","description":"\u003cp style=\"text-align: left;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0273\/1491\/files\/download_89a23d83-7a50-4507-9890-c1ec4e9d0b4d.png?v=1760034359\" alt=\"Project Mu Banner\" style=\"display: block; margin-left: auto; margin-right: auto; max-width: 100%; height: auto;\"\u003e\u003c\/p\u003e\n\u003chr\u003e\n\u003ch2 style=\"text-align: center;\" dir=\"ltr\"\u003e\u003cspan\u003eOVERVIEW\u003c\/span\u003e\u003c\/h2\u003e\n\u003cp\u003eAchieve maximum front axle clamping force and high-temperature thermal durability with the Project Mu 4POT FS44 Forged Front Caliper Kit for 2013+ GR86 \/ BRZ \/ 86 \/ FR-S (ZN6\/ZC6\/ZN8\/ZD8). 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 345mm x 32mm 2-piece straight 8-slit floating rotors, this 345mm variant offers full race-grade thermal capacity while maintaining clearance with select 17-inch track wheel setups.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\n\u003c!-- FRONT-TO-FRONT PRODUCT COMPARISON TABLE --\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; text-align: left;\" border=\"1\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"background-color: #f2f2f2;\"\u003e\n\u003cth style=\"padding: 8px;\"\u003eCaliper Feature \/ Spec\u003c\/th\u003e\n\u003cth style=\"padding: 8px;\"\u003e\u003cstrong\u003eFS4M Street 4POT\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth style=\"padding: 8px;\"\u003e\u003cstrong\u003eFS44S Slim 4POT\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth style=\"padding: 8px; background-color: #d9ead3;\"\u003e\u003cstrong\u003eFS44 Full-Size 4POT (345mm)\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth style=\"padding: 8px;\"\u003e\u003cstrong\u003eFS44 Full-Size 4POT (355mm)\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eAxle Position\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eFront Axle Specific\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eFront Axle Specific\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; background-color: #d9ead3;\"\u003e\u003cstrong\u003eFront Axle Specific\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eFront Axle Specific\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eCaliper Profile \u0026amp; Width\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eCompact Street Body (17\" Wheel Friendly)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eSlim Body (140.2mm Width - High Spoke Clearance)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; background-color: #d9ead3;\"\u003e\u003cstrong\u003eStandard Full Body (156.25mm Width - Heavy Duty)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eStandard Full Body (156.25mm Width - Heavy Duty)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003ePiston Diameter \/ Pad Layout\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e4-Pistons x 2-Pads (Standard)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e38mm Pistons x 4 (4-Pads per Caliper)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; background-color: #d9ead3;\"\u003e\u003cstrong\u003e41mm Oversized Pistons x 4 (4-Pads per Caliper)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e41mm Oversized Pistons x 4 (4-Pads per Caliper)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eRotor Specs \u0026amp; Thickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e315mm x 30mm (1-Piece Round 6-Slit)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e355mm x 28mm (2-Piece Straight 8-Slit)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; background-color: #d9ead3;\"\u003e\u003cstrong\u003e345mm x 32mm Heavy-Duty (2-Piece Straight 8-Slit)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e355mm x 32mm Heavy-Duty (2-Piece Straight 8-Slit)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eTarget Application\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eStreet Upgrade \/ Fits OEM 17\" Wheels\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eStreet \u0026amp; Track with Tight Wheel Clearance\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; background-color: #d9ead3;\"\u003e\u003cstrong\u003eHeavy-Duty Circuit \/ 17\"+ Wheel Friendly Track Day\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eHeavy-Duty Circuit \/ Maximum Heat Mass (18\"+ Wheels)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr\u003e\n\u003ch2 style=\"text-align: center;\" dir=\"ltr\"\u003e\u003cspan\u003eFEATURES\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eFull-Size Forged Caliper Architecture:\u003c\/strong\u003e 156.25mm overall width body structure provides maximum torsional rigidity under high hydraulic pressure.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eOversized 41mm Pistons:\u003c\/strong\u003e Larger piston bore area generates increased overall clamping torque compared to slim body models.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003e4-Piston x 4-Pad System:\u003c\/strong\u003e Drives 4 individual pads per caliper to ensure even pad wear, eliminate thermal taper, and maximize initial bite response.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003e345mm x 32mm 2-Piece Rotors:\u003c\/strong\u003e 32mm thick floating rotors provide extreme thermal capacity while expanding compatibility with select high-performance 17-inch wheels.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eStraight 8-Slit Vents:\u003c\/strong\u003e 8-slit face pattern continuously cleans pad friction faces and exhausts out friction gases.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eDust Seal Barrier System:\u003c\/strong\u003e Features dedicated outer dust seals positioned in front of the main oil seals to prevent debris, dust, and grime from damaging inner hydraulics.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003chr\u003e\n\u003ch2 style=\"text-align: center;\" dir=\"ltr\"\u003e\u003cspan\u003eWHAT IS INCLUDED\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e2x Project Mu FS44 Forged 4-Piston Front Calipers (Signature Teal Finish)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e2x Project Mu 345mm x 32mm 2-Piece Front Brake Rotors (Straight 8-Slit)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e8x Project Mu Performance Front Brake Pads (4 Pads per Caliper - Standard NS-C Compound)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e2x CNC Machined Aluminum Caliper Mounting Brackets \u0026amp; Hardware\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e2x Stainless Steel Braided Brake Lines with Teflon Inner Core\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003ePad Support Springs \u0026amp; Complete Installation Hardware\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2 style=\"text-align: center;\" dir=\"ltr\"\u003e\u003cspan\u003ePART NUMBERS\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e FS44-F103A\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2 style=\"text-align: center;\" dir=\"ltr\"\u003e\u003cspan\u003eSPECIFICATIONS\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003ePosition:\u003c\/strong\u003e Front Axle\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eCaliper Type:\u003c\/strong\u003e Forged Aluminum 4-Piston Standard Full Body (FS44)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003ePiston Diameter:\u003c\/strong\u003e 41mm x 4\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eCaliper Dimensions:\u003c\/strong\u003e Length: 282.8mm | Width: 156.25mm | Height: 72.3mm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eRotor Dimensions:\u003c\/strong\u003e 345mm Diameter x 32mm Thickness (2-Piece Floating)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eRotor Venting \/ Slits:\u003c\/strong\u003e Vented with Straight 8-Slit Pattern\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eStandard Included Compound:\u003c\/strong\u003e Project Mu NS-C (Optional: TYPE PS or D1 spec ZERO)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eFinish:\u003c\/strong\u003e Hard Anodized + Signature Teal Powder Coat\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2 style=\"text-align: center;\" dir=\"ltr\"\u003e\u003cspan\u003eFITMENT\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e2022+ Toyota GR86 (ZN8) \u0026amp; Subaru BRZ (ZD8)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e2013-2021 Toyota 86 \/ Scion FR-S (ZN6) \u0026amp; Subaru BRZ (ZC6)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cem\u003e*Requires select 17-inch or larger aftermarket wheels (check wheel template for barrel clearance)\u003c\/em\u003e\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr\u003e\n\u003ch2 style=\"text-align: center;\" dir=\"ltr\"\u003e\u003cspan\u003eDISCLAIMER\u003c\/span\u003e\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eBackplate Processing Required:\u003c\/strong\u003e Installation requires trimming or modifying OEM front brake dust shields\/backplates.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eNon-Affiliation \u0026amp; Warranty:\u003c\/strong\u003e Direct parallel import of authentic JDM components. We are an independent retailer, not an authorized Project Mu dealer. Factory warranty applies in Japan only.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003e14-Day Defect Window:\u003c\/strong\u003e 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.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eInstallation:\u003c\/strong\u003e Manuals are in Japanese. Professional installation by a certified technician is required.\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Project Mu","offers":[{"title":"Default Title","offer_id":48574680531156,"sku":"FS44-F103A","price":3595.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0273\/1491\/files\/Project_Mu_FS44_4POT_Front_BBK_345x32mm_ZN6_ZC6_ZN8_ZD8.jpg?v=1787933524","url":"https:\/\/shop.battlegarage-rs.com\/products\/project-mu-fs44-4pot-front-bbk-345x32mm-zn6-zc6-zn8-zd8","provider":"Battle Garage Racing Service","version":"1.0","type":"link"}