{"product_id":"synchrotech-replacement-k-series-synchro-set-carbon-brass","title":"Synchrotech Replacement K Series Synchro Set for Honda\/Acura","description":"\u003cul\u003e\n\u003cli\u003eSynchros Only, No Springs or Sleeves Included \u003c\/li\u003e\n\u003cli\u003eCarbon or Brass Materials Available \u003c\/li\u003e\n\u003cli\u003eFitments for Multiple K Series Transmissions \u003c\/li\u003e\n\u003cli\u003eMatch Your Gear Range and Cone Style When Ordering \u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003c!-- split --\u003e\n\u003cul class=\"tabs\"\u003e\n\u003cli\u003e\u003ca class=\"active\" href=\"#Description\"\u003eDescription\u003c\/a\u003e\u003c\/li\u003e\n \u003cli\u003e\u003ca href=\"#VehicleFitment\"\u003eVehicle Fitment\u003c\/a\u003e\u003c\/li\u003e \u003c\/ul\u003e\n\u003cul class=\"tabs-content\"\u003e\n\n\n\u003cli class=\"active\" id=\"Description\"\u003e\n\u003ch3\u003eSynchrotech K-Series Synchro Set - Carbon or Brass\u003c\/h3\u003e\n\n\u003cp\u003eIf your K-series grinds going into gear, the synchros are what's worn. This is the set that replaces them, and nothing else. No springs, no bearings, no sleeves, just the synchro rings in either brass or Synchrotech's carbon composite. If you've had the transmission open, inspected everything, and found the synchros are the problem, this is the part rather than a full kit you don't need.\u003c\/p\u003e\n\n\u003ch4\u003eWhich Part Do You Actually Need?\u003c\/h4\u003e\n\n\u003cp\u003eThree parts, three different symptoms. Match yours before you spend money.\u003c\/p\u003e\n\n\u003ctable\u003e\n    \u003cthead\u003e\n        \u003ctr\u003e\n            \u003cth scope=\"col\"\u003eSymptom\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eLikely Part\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n\u003ctd\u003eGrinds going into gear\u003c\/td\u003e\n\u003ctd\u003eSynchro\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003ePops out of gear under load\u003c\/td\u003e\n\u003ctd\u003eSleeve\u003c\/td\u003e\n\u003c\/tr\u003e\n        \u003ctr\u003e\n\u003ctd\u003eBinds, feels notchy, or blocks out mid-shift\u003c\/td\u003e\n\u003ctd\u003eHub\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cp\u003eThat first one is what brings people here. When a synchro's friction surface wears down, it can't drag the gear to matching speed fast enough before the sleeve arrives, so the teeth clash instead of meshing. That's the grind, and it's usually worse on downshifts than upshifts.\u003c\/p\u003e\n\n\u003cp\u003eFinding wear in more than one of these? The \u003ca href=\"https:\/\/www.hybrid-racing.com\/products\/synchrotech-transmissions-synchro-master-rebuild-kit-honda-acura-k-series?_pos=1\u0026amp;_sid=a5f5643a7\u0026amp;_ss=r\" target=\"_blank\" rel=\"noopener noreferrer\"\u003emaster rebuild kit\u003c\/a\u003e covers everything at once and works out cheaper than buying the pieces separately.\u003c\/p\u003e\n\n\u003ch4\u003eSynchros Only, Nothing Else\u003c\/h4\u003e\n\n\u003cp\u003eWorth being clear, since we sell a few things that look similar.\u003c\/p\u003e\n\n\u003cp\u003eThis is \u003cstrong\u003esynchros alone\u003c\/strong\u003e. No springs, bearings, seals, or sleeves. That makes it right when you've got the transmission open, you've inspected everything, and the synchros are genuinely the only thing past spec.\u003c\/p\u003e\n\n\u003cp\u003eIf your springs are tired too, and after this many years they usually are, look at the \u003ca href=\"https:\/\/www.hybrid-racing.com\/products\/synchrotech-bearing-seal-synchro-rebuild-kit-k-series?_pos=1\u0026amp;_sid=00a274b9a\u0026amp;_ss=r\" target=\"_blank\" rel=\"noopener noreferrer\"\u003ebearing and seal kit\u003c\/a\u003e or the master kit instead. Springs are cheap and they directly affect how well a synchro engages, so reusing old ones behind new synchros is a common way to end up disappointed.\u003c\/p\u003e\n\n\u003ch4\u003eCarbon Or Brass?\u003c\/h4\u003e\n\n\u003cp\u003eBoth fix a grinding transmission. They suit different cars.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eBrass\u003c\/strong\u003e is the OEM-style material and the right pick for most street cars. It restores factory shift feel, it's proven over decades, and it costs less. Refreshing a daily driver, start here.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eCarbon\u003c\/strong\u003e is Synchrotech's Pro Series, and it's genuinely different from OEM brass or the spray-coated and woven-fabric carbon synchros out there. These use a full carbon composite lining built on carbon-carbon technology originally developed for aerospace, and the material acts as a braking element during engagement. It stops the gear faster, which means less grind on high-rpm shifts and less wear on your sleeves and engagement teeth. If you shift hard, run track days, drag race, or make real power, this is the one.\u003c\/p\u003e\n\n\u003cp\u003eOne honest note: carbon shifts better, but don't buy it expecting dramatically longer life than brass. You're paying for how it engages.\u003c\/p\u003e\n\n\u003ch4\u003ePick Your Set Carefully\u003c\/h4\u003e\n\n\u003cp\u003eTwo things determine which set you need: \u003cstrong\u003ehow many gears you're covering\u003c\/strong\u003e, and \u003cstrong\u003ewhat synchro design your transmission uses\u003c\/strong\u003e. Get both right.\u003c\/p\u003e\n\n\u003ctable\u003e\n    \u003cthead\u003e\n        \u003ctr\u003e\n            \u003cth scope=\"col\"\u003ePart Number\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eCoverage\u003c\/th\u003e\n            \u003cth scope=\"col\"\u003eFits\u003c\/th\u003e\n        \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSYN119\u003c\/td\u003e\n            \u003ctd\u003e1-4\u003c\/td\u003e\n            \u003ctd\u003e2002-2015 6-speed: RSX, TSX, ITR, CTR, Civic Si (K20 \/ K24 \/ EP3 \/ FN2 \/ FD2)\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSYN118\u003c\/td\u003e\n            \u003ctd\u003e1-6\u003c\/td\u003e\n            \u003ctd\u003eRSX, TSX, ITR, CTR (K20 \/ EP3) with dual cone 3-piece 5th and 6th\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSYN117\u003c\/td\u003e\n            \u003ctd\u003e1-6\u003c\/td\u003e\n            \u003ctd\u003e2005-2015 6-speed: RSX, TSX, ITR, CTR, Civic Si (K20 \/ K24 \/ EP3 \/ FN2 \/ FD2) with single cone 1-piece 5th and 6th\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSYN116\u003c\/td\u003e\n            \u003ctd\u003e1-5\u003c\/td\u003e\n            \u003ctd\u003e2002-2006 5-speed: RSX, Civic Si (K20 \/ EP3), triple cone 1st and 2nd, single cone 3rd through 5th\u003c\/td\u003e\n        \u003c\/tr\u003e\n        \u003ctr\u003e\n            \u003ctd\u003eSYN114\u003c\/td\u003e\n            \u003ctd\u003eFull set\u003c\/td\u003e\n            \u003ctd\u003e2002-2006 CR-V, 2003-2008 Element, 2003-2007 Accord (APG6, K24)\u003c\/td\u003e\n        \u003c\/tr\u003e\n    \u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch4\u003eTwo Things That Catch People Out\u003c\/h4\u003e\n\n\u003cp\u003e\u003cstrong\u003eThe 5th and 6th gear split.\u003c\/strong\u003e SYN118 and SYN117 both cover gears 1 through 6, and they are not interchangeable. The difference is entirely in 5th and 6th: one uses a dual cone 3-piece design, the other a single cone 1-piece. Look at what's actually in your transmission rather than going by the car, because both sets list the same models.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eOnly need the low gears?\u003c\/strong\u003e SYN119 covers 1 through 4 on 6-speed transmissions. If your grinding is isolated to the gears you actually use hard and 5th and 6th are still fine, that's the more sensible buy. First through third take the most abuse on almost every car.\u003c\/p\u003e\n\n\u003cp\u003eIf you're not certain which design you've got, check the transmission code on the case and inspect the synchros with the case open. Getting this wrong means parts that won't work in a job you don't want to do twice.\u003c\/p\u003e\n\n\u003ch4\u003eCheck Your Hubs And Sleeves While You're In There\u003c\/h4\u003e\n\n\u003cp\u003eThe most important advice on this page. Synchros work against your hubs and sleeves, and if those surfaces are worn, new synchros of any material won't fix your shifting. New carbon on a chewed-up hub is no better than new brass on a chewed-up hub.\u003c\/p\u003e\n\n\u003cp\u003eSo inspect before you close it up. Look at the engagement teeth, the sleeves, and the hubs. Sharp and clean means this set will transform the shift. Rounded off means you need those parts too, and finding out now is far better than after everything's back together.\u003c\/p\u003e\n\n\u003ch4\u003eWorth Doing Once\u003c\/h4\u003e\n\n\u003cp\u003eGetting into a K-series transmission is most of the work on this job, whether you're paying a shop or spending your own weekend. The parts are the cheaper half by a wide margin. So while it's open, inspect everything and replace what's genuinely past spec rather than what you assumed was bad. That's how you close it up once and get the shift you were after.\u003c\/p\u003e\n\n\u003ch4\u003eWho Should Run This Set\u003c\/h4\u003e\n\n\u003cp\u003eThis is for the builder who's already in the transmission, has inspected it properly, and knows the synchros are the problem. You're buying exactly what you need without paying for parts that are still good. If you haven't opened it up yet, or you're finding wear in several places, the master kit is the better value. Pick brass or carbon based on how you drive, match your set carefully, and get your shifts back.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFits:\u003c\/strong\u003e Honda and Acura K-series transmissions, see the table above. \u003cstrong\u003eMaterials:\u003c\/strong\u003e brass (OEM-style) or Synchrotech Pro Series carbon composite. \u003cstrong\u003eIncludes:\u003c\/strong\u003e synchros only. No springs, bearings, seals, or sleeves. \u003cstrong\u003ePart numbers:\u003c\/strong\u003e SYN119 (1-4, 6-speed), SYN118 (1-6, dual cone 5\/6), SYN117 (1-6, single cone 5\/6), SYN116 (1-5, 5-speed), SYN114 (CR-V \/ Element \/ Accord APG6). \u003cstrong\u003eImportant:\u003c\/strong\u003e confirm both your gear coverage and your synchro design before ordering.\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n \u003cp\u003e2002-2006 Acura RSX Base\/Type S\u003cbr\u003e2004-2008 Acura TSX\u003cbr\u003e2003-2007 Honda Accord\u003cbr\u003e2002-2015 Honda Civic Si\u003cbr\u003e2002-2006 Honda CR-V\u003cbr\u003e2003-2008 Honda Element\u003c\/p\u003e \n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"Synchrotech Transmissions","offers":[{"title":"K20A\/K20Z\/K24A2 1-6 Gears - Single Cone 5\/6th \/ Carbon","offer_id":46472188035106,"sku":"SYN-SYN117","price":346.45,"currency_code":"USD","in_stock":false},{"title":"K24A1\/K24A4\/K24A8 \/ Carbon","offer_id":46472188067874,"sku":"SYN-SYN114","price":288.7,"currency_code":"USD","in_stock":false},{"title":"K24A1\/K24A4\/K24A8 \/ Brass","offer_id":46472188100642,"sku":"SYN-SYN114B","price":230.95,"currency_code":"USD","in_stock":false},{"title":"K20A3 5 Speed \/ Carbon","offer_id":46472188133410,"sku":"SYN-SYN116","price":288.7,"currency_code":"USD","in_stock":false},{"title":"K20A3 5 Speed \/ Brass","offer_id":46472188166178,"sku":"SYN-SYN116B","price":230.95,"currency_code":"USD","in_stock":false},{"title":"K20A\/K20Z\/K24A2 1-6 Gears - Single Cone 5\/6th \/ Brass","offer_id":46472188198946,"sku":"SYN-SYN117B","price":288.7,"currency_code":"USD","in_stock":false},{"title":"K20A\/K20Z\/K24A2 1-6 Gears - Dual Cone 5\/6th \/ Carbon","offer_id":46472188231714,"sku":"SYN-SYN118","price":346.45,"currency_code":"USD","in_stock":false},{"title":"K20A\/K20Z\/K24A2 1-6 Gears - Dual Cone 5\/6th \/ Brass","offer_id":46472188264482,"sku":"SYN-SYN118B","price":288.7,"currency_code":"USD","in_stock":false},{"title":"K20A\/K20Z\/K24A2 1-4 Gears \/ Carbon","offer_id":46472188297250,"sku":"SYN-SYN119","price":288.7,"currency_code":"USD","in_stock":false},{"title":"K20A\/K20Z\/K24A2 1-4 Gears \/ Brass","offer_id":46472188330018,"sku":"SYN-SYN119B","price":230.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/SYN-SYN117_sltp.jpg?v=1787260861","url":"https:\/\/www.hybrid-racing.com\/products\/synchrotech-replacement-k-series-synchro-set-carbon-brass","provider":"Hybrid Racing","version":"1.0","type":"link"}