{"product_id":"project-mu-fs2a-2pot-rear-bbk-316x20mm-2013-zn6-zc6-zn8-zd8","title":"Project Mu FS2A 2POT Rear BBK 316x20mm 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\u003eStrengthen rear stopping capability and optimize brake bias with the Project Mu 2POT FS2A Forged Rear Caliper Kit for 2013+ GR86 \/ BRZ \/ 86 \/ FR-S (ZN6\/ZC6\/ZN8\/ZD8). Engineered as a high-performance rear-dedicated system, the FS2A features a compact forged aluminum 2-piston caliper housing oversized 41mm pistons. By matching piston displacement to balance with high-output front BBKs, the FS2A delivers consistent rear stability, precise pedal feel, and reduced unsprung weight. Paired with lightweight 316mm x 20mm 1-piece straight 8-slit rotors, this kit is an ideal rear upgrade for street, drift, and light track setups.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\n\u003c!-- REAR-TO-REAR 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\u003eSCR-PRO Rear Rotor Upgrade\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth style=\"padding: 8px; background-color: #d9ead3;\"\u003e\u003cstrong\u003eFS2A Rear 2POT\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth style=\"padding: 8px;\"\u003e\u003cstrong\u003eFS44R Rear 4POT\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth style=\"padding: 8px;\"\u003e\u003cstrong\u003eFS44R Large Rear 4POT\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;\"\u003eRear Axle Specific\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; background-color: #d9ead3;\"\u003e\u003cstrong\u003eRear Axle Specific\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eRear Axle Specific\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eRear Axle Specific\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eCaliper Type \/ Architecture\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eFactory Single-Piston Rear Caliper\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; background-color: #d9ead3;\"\u003e\u003cstrong\u003eCompact Rear 2POT Forged Body\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eBalanced Rear 4POT Forged Body\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eLarge Rear 4POT Forged Body\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003ePiston \/ Pad Architecture\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e1-Piston x 1-Pad per side (OEM)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; background-color: #d9ead3;\"\u003e\u003cstrong\u003e41mm Pistons x 2 (2-Pads per Caliper)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e4-Pistons x 4-Pads (1 Pad \/ Piston)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e4-Pistons x 4-Pads (1 Pad \/ Piston)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"padding: 8px;\"\u003e\u003cstrong\u003eRotor Spec \/ Design\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e290mm x 18mm (2-Piece Direct Replacement)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; background-color: #d9ead3;\"\u003e\u003cstrong\u003e316mm x 20mm (1-Piece Straight 8-Slit)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e345mm x 32mm (2-Piece Straight 8-Slit)\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003e355mm x 32mm (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;\"\u003eOEM Replacement \/ Street Performance\u003c\/td\u003e\n\u003ctd style=\"padding: 8px; background-color: #d9ead3;\"\u003e\u003cstrong\u003eStreet, Drift \u0026amp; Light Track Rear Upgrade\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eHeavy-Duty Trackday \u0026amp; Circuit Rear Upgrade\u003c\/td\u003e\n\u003ctd style=\"padding: 8px;\"\u003eMaximum Thermal Capacity Circuit Setup\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\u003eDedicated Rear 2-Piston Architecture:\u003c\/strong\u003e Specifically valved with 41mm pistons to optimize hydraulic brake bias and rear axle stability under hard braking.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eForged Aluminum Alloy Construction:\u003c\/strong\u003e Compact forged aluminum caliper body minimizes un-sprung mass while offering high body rigidity.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003e316mm x 20mm 1-Piece Rotors:\u003c\/strong\u003e Lightweight 1-piece vented rotors increase overall heat dissipation surface area compared to stock rear brakes.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eStraight 8-Slit Rotor Venting:\u003c\/strong\u003e 8-slit face design continuously wipes pad friction surfaces and vents out boundary friction gases.\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eDust Seal Barrier Structure:\u003c\/strong\u003e Incorporates dedicated outer dust seals ahead of the inner pressure oil seals to prevent grit, brake dust, and debris from contaminating internal 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 FS2A Forged 2-Piston Rear Calipers (Signature Teal Finish)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e2x Project Mu 316mm x 20mm 1-Piece Rear Brake Rotors (Straight 8-Slit)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli role=\"presentation\" dir=\"ltr\"\u003e\u003cspan\u003e4x Project Mu Performance Rear Brake Pads (2 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\u003eComplete Set of Installation Bolts \u0026amp; 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 FS2A-F204R\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 Rear Axle\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eCaliper Type:\u003c\/strong\u003e Forged Aluminum 2-Piston Rear (FS2A)\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003ePiston Diameter:\u003c\/strong\u003e 41mm x 2\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eCaliper Dimensions:\u003c\/strong\u003e Length: 188.0mm | Width: 144.2mm | Height: 50.0mm\u003c\/span\u003e\u003c\/li\u003e\n\u003cli dir=\"ltr\"\u003e\u003cspan\u003e\u003cstrong\u003eRotor Dimensions:\u003c\/strong\u003e 316mm Diameter x 20mm Thickness (1-Piece)\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 most 17-inch or larger wheels\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 rear 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":48574614044884,"sku":"FS2A-F204R","price":2595.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0273\/1491\/files\/Project_Mu_FS2A_2POT_Rear_BBK_316x20mm_2013_ZN6_ZC6_ZN8_ZD8.jpg?v=1787933039","url":"https:\/\/shop.battlegarage-rs.com\/products\/project-mu-fs2a-2pot-rear-bbk-316x20mm-2013-zn6-zc6-zn8-zd8","provider":"Battle Garage Racing Service","version":"1.0","type":"link"}