{"product_id":"mercedes-amg-725-9g-spool-fx-rt-upgraded-transmiss","title":"Mercedes-AMG 725 9G Spool FX-RT Upgraded Transmission Clutch Kit","description":"\u003cp\u003eThe Spool FX-RT upgraded clutch kit for the Mercedes 725 9G transmission raises clutch-limited torque capacity to about 1,700 Nm for high-power AMG builds.\u003c\/p\u003e\u003ch2\u003eWhy you need it\u003c\/h2\u003e\u003cp\u003eThe 725 9G is strong from the factory, but past the mid-700 Nm range the stock frictions start to slip under repeated high load and heat. Spool's FX-RT friction material, proven in its 8HP50 kits, adds about 20% more friction coefficient, and the kit increases the plate count in all six clutch packs. Together that lifts torque capacity by 68% to 71% depending on gear, from a factory rating of 1,000 Nm.\u003c\/p\u003e\u003ch2\u003eFits\u003c\/h2\u003e\u003cul\u003e\u003cli\u003eMercedes-AMG models with the 725 9G transmission, including high-power M177 builds, GLE63, GLS63, E63 and S63\u003c\/li\u003e\u003c\/ul\u003e\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eFX-RT high-coefficient, high-energy friction material\u003c\/li\u003e\n\u003cli\u003eHigher plate counts in clutches A through F\u003c\/li\u003e\n\u003cli\u003eAbout 1,680 Nm clutch-limited rating in 1st to 4th and about 1,714 Nm in 5th to 9th\u003c\/li\u003e\n\u003cli\u003eBetter thermal stability and less shift flare and slip\u003c\/li\u003e\n\u003cli\u003eWorks with factory drums, pistons and snap-ring locations\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWhat's included\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eClutch A pack: 6 FX-RT frictions, 6 upgraded steels, custom pressure plate\u003c\/li\u003e\n\u003cli\u003eClutch B pack: 7 FX-RT frictions, 7 steels, custom pressure plate\u003c\/li\u003e\n\u003cli\u003eClutch C pack: 7 FX-RT frictions, 7 steels, custom pressure plate\u003c\/li\u003e\n\u003cli\u003eClutch D pack: 9 internal and 9 external spline FX-RT discs, custom pressure plate\u003c\/li\u003e\n\u003cli\u003eClutch E pack: 9 FX-RT frictions, 9 steels, custom pressure plate\u003c\/li\u003e\n\u003cli\u003eClutch F pack: 10 FX-RT frictions, 10 steels, custom pressure plate\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eGood to know\u003c\/h2\u003e\u003cp\u003eEach clutch pack comes pre-measured and packaged for consistent clearances, with no machining needed. This is a transmission rebuild part and should be installed by an experienced transmission builder.\u003c\/p\u003e","brand":"Spool Performance","offers":[{"title":"Default Title","offer_id":46564601593941,"sku":"SP-AMG725-CK","price":3999.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0638\/9769\/8389\/files\/pic1_copy.jpg?v=1793251075","url":"https:\/\/www.wrenchhaususa.com\/products\/mercedes-amg-725-9g-spool-fx-rt-upgraded-transmiss","provider":"Wrench Haus","version":"1.0","type":"link"}