{"product_id":"grimmspeed-4-piston-brake-caliper-kit-for-02-21-wrx-sti-326mm-rotor","title":"GrimmSpeed 4-Piston Brake Caliper Kit For 02-21 WRX\/STI (326mm Rotor)","description":"\u003ch4 data-end=\"350\" data-start=\"331\"\u003e\u003cem\u003e\u003cstrong data-end=\"350\" data-start=\"335\"\u003e*Caliper Orders Will Begin Shipping August 8th\u003c\/strong\u003e\u003c\/em\u003e\u003c\/h4\u003e\n\u003ch3 data-end=\"350\" data-start=\"331\"\u003e\u003cstrong data-end=\"350\" data-start=\"335\"\u003eDescription\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cp data-end=\"614\" data-start=\"352\"\u003eThe stock single-piston caliper found on most Subaru platforms gets the job done — but it wasn’t designed for the kind of aggressive driving, tracking, or build evolution most GrimmSpeed drivers pursue. That’s where our \u003cstrong data-end=\"604\" data-start=\"570\"\u003e4-Piston Brake Caliper Kit\u003c\/strong\u003e comes in.\u003c\/p\u003e\n\u003cp data-end=\"969\" data-start=\"616\"\u003ePurpose-built for Subaru performance, this fixed caliper setup brings balanced stopping power, improved heat management, and consistent pedal feel to your favorite chassis. Designed in-house and tested under real-world conditions, the system offers a true performance solution — with no need to chase down used Brembos or deal with custom brackets.\u003c\/p\u003e\n\u003cp data-end=\"1380\" data-start=\"971\"\u003eEach kit is application-specific, pairing our forged aluminum calipers with the correct rotor and bracket configuration for your setup. Calipers are available in your choice of \u003cstrong data-end=\"1155\" data-start=\"1148\"\u003eRed\u003c\/strong\u003e or \u003cstrong data-end=\"1189\" data-start=\"1159\"\u003eGunmetal Gray anodized finishes\u003c\/strong\u003e, both designed to withstand heat and resist corrosion while delivering a clean, motorsports-ready look. From street builds to track cars, this is the braking confidence your Subaru deserves.\u003c\/p\u003e\n\u003ch3 data-end=\"1410\" data-start=\"1387\"\u003e\u003cstrong data-end=\"1410\" data-start=\"1394\"\u003eKey Features\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-end=\"2092\" data-start=\"1411\"\u003e\n\u003cli data-end=\"1525\" data-start=\"1411\"\u003e\n\u003cp data-end=\"1525\" data-start=\"1413\"\u003e\u003cstrong data-end=\"1453\" data-start=\"1413\"\u003eForged 6061-T6 Aluminum Caliper Body\u003c\/strong\u003e – 2-piece design, hard anodized for strength and corrosion resistance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1637\" data-start=\"1526\"\u003e\n\u003cp data-end=\"1637\" data-start=\"1528\"\u003e\u003cstrong data-end=\"1549\" data-start=\"1528\"\u003eDual Piston Setup\u003c\/strong\u003e – 44mm primary and 41mm secondary pistons provide even pad pressure and reduced taper\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1733\" data-start=\"1638\"\u003e\n\u003cp data-end=\"1733\" data-start=\"1640\"\u003e\u003cstrong data-end=\"1664\" data-start=\"1640\"\u003eHeat-Managed Pistons\u003c\/strong\u003e – Type 3 hard anodized and vented for superior thermal performance\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1821\" data-start=\"1734\"\u003e\n\u003cp data-end=\"1821\" data-start=\"1736\"\u003e\u003cstrong data-end=\"1758\" data-start=\"1736\"\u003eLightweight Design\u003c\/strong\u003e – Approximately 9.9 lbs per corner with bracket and hardware\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1892\" data-start=\"1822\"\u003e\n\u003cp data-end=\"1892\" data-start=\"1824\"\u003e\u003cstrong data-end=\"1845\" data-start=\"1824\"\u003ePad Compatibility\u003c\/strong\u003e – FMSI D1001 or D968 (varies by application)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"1978\" data-start=\"1893\"\u003e\n\u003cp data-end=\"1978\" data-start=\"1895\"\u003e\u003cstrong data-end=\"1918\" data-start=\"1895\"\u003eRotor Compatibility\u003c\/strong\u003e – Works with commonly available Subaru OEM and STI rotors\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2092\" data-start=\"1979\"\u003e\n\u003cp data-end=\"2092\" data-start=\"1981\"\u003e\u003cstrong data-end=\"2008\" data-start=\"1981\"\u003eNo Brake Lines Required\u003c\/strong\u003e – Compatible with factory lines (new lines may be recommended depending on vehicle)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-end=\"2125\" data-start=\"2099\"\u003e\u003cstrong data-end=\"2125\" data-start=\"2106\"\u003eWhat’s Included\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul data-end=\"2502\" data-start=\"2126\"\u003e\n\u003cli data-end=\"2193\" data-start=\"2126\"\u003e\n\u003cp data-end=\"2193\" data-start=\"2128\"\u003e(2) GrimmSpeed 4-Piston Brake Calipers (choose Red or Gunmetal)\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2253\" data-start=\"2194\"\u003e\n\u003cp data-end=\"2253\" data-start=\"2196\"\u003e(2) Vehicle-Specific Billet 4140 Steel Caliper Brackets\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2444\" data-start=\"2254\"\u003e\n\u003cp data-end=\"2274\" data-start=\"2256\"\u003eFull Hardware Kit:\u003c\/p\u003e\n\u003cul data-end=\"2444\" data-start=\"2277\"\u003e\n\u003cli data-end=\"2293\" data-start=\"2277\"\u003e\n\u003cp data-end=\"2293\" data-start=\"2279\"\u003eBridge bolts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2311\" data-start=\"2296\"\u003e\n\u003cp data-end=\"2311\" data-start=\"2298\"\u003eBanjo bolts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2331\" data-start=\"2314\"\u003e\n\u003cp data-end=\"2331\" data-start=\"2316\"\u003eCrush washers\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2355\" data-start=\"2334\"\u003e\n\u003cp data-end=\"2355\" data-start=\"2336\"\u003eBleeder dust caps\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2380\" data-start=\"2358\"\u003e\n\u003cp data-end=\"2380\" data-start=\"2360\"\u003eCaliper guide pins\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2407\" data-start=\"2383\"\u003e\n\u003cp data-end=\"2407\" data-start=\"2385\"\u003eSecurity cotter pins\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2444\" data-start=\"2410\"\u003e\n\u003cp data-end=\"2444\" data-start=\"2412\"\u003eCaliper spring bridges + bolts\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2479\" data-start=\"2445\"\u003e\n\u003cp data-end=\"2479\" data-start=\"2447\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0743\/3165\/2402\/files\/WRX_STI_BRZ_326_Rotor_Wheel_Clearance_Template.pdf?v=1753977099\"\u003ePrintable 1:1 Fitment Template\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli data-end=\"2502\" data-start=\"2480\"\u003e\n\u003cp data-end=\"2502\" data-start=\"2482\"\u003eInstall Instructions\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3 data-end=\"2527\" data-start=\"2509\"\u003e\u003cstrong data-end=\"2527\" data-start=\"2516\"\u003eFitment\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cstrong\u003e02-21 WRX\u003c\/strong\u003e\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e04-21 STI\u003c\/strong\u003e\n\u003cul\u003e\n\u003cli\u003eRotor Size: 326mm\u003c\/li\u003e\n\u003cli\u003ePad Type: F50 (FMSI D1001)\u003c\/li\u003e\n\u003cli\u003eDesigned for use with OEM-style hubs and rotors — no knuckle swaps or custom adapters required.\u003cbr\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e        \u003cem\u003e *OEM - 5x100 - 326mm x 30mm Rotor - Also came on some BRZ (5x100 Cars Only) Pre-2015 WRX\/STI  Part No.-26300FE001\u003c\/em\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cem\u003e         *OEM 5x114.3 - 326mm x 30mm Rotor - Fit 4 pot Brembos (5x114.3 Cars Only) 2015+ WRX\/STI   Part No.-26300FE070\u003c\/em\u003e\u003c\/p\u003e\n\u003ch2 style=\"text-align: center;\"\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0743\/3165\/2402\/files\/GRM11341-2.XXX_GrimmSpeedBigBrake_Kit_InstallGuide_V3.pdf?v=1755726404\"\u003e\u003cstrong\u003e\u003cem\u003eINSTALLATION GUIDE\u003c\/em\u003e\u003c\/strong\u003e\u003c\/a\u003e\u003c\/h2\u003e","brand":"GrimmSpeed","offers":[{"title":"Red","offer_id":46489532072092,"sku":null,"price":3131.8,"currency_code":"CAD","in_stock":true},{"title":"Gunmetal Gray","offer_id":46489532104860,"sku":null,"price":3131.8,"currency_code":"CAD","in_stock":true}],"url":"https:\/\/www.mypartsguy.ca\/products\/grimmspeed-4-piston-brake-caliper-kit-for-02-21-wrx-sti-326mm-rotor","provider":"My Parts Guy MPG Auto","version":"1.0","type":"link"}