{"product_id":"hybrid-racing-k-series-5-8-inch-hose-barb-coolant-return-fitting","title":"Hybrid Racing 5\/8\" Barb Coolant Return Fitting for K Series","description":"\u003cul\u003e\n\u003cli\u003e5\/8\" Barb Coolant Return Fitting for Rubber Hoses \u003c\/li\u003e\n\u003cli\u003eCompatible with PRB and RBC Thermostat Case \u003c\/li\u003e\n\u003cli\u003eFits K20A, K20Z, K24A, and K24Z Engines \u003c\/li\u003e\n\u003cli\u003eEnsures Your Turbo K Series Stays Cool \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  \u003cli\u003e\u003ca href=\"#TechnicalData\"\u003eTechnical Data\u003c\/a\u003e\u003c\/li\u003e   \u003cli\u003e\u003ca href=\"#Included\"\u003eIncluded\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\u003eHybrid Racing K Series 5\/8\" Barb Coolant Return Fitting\u003c\/h3\u003e\n\n\u003cp\u003eYou swapped a K series into your S2000 or your Miata and you're staring at the factory steel hard line that's supposed to route the coolant return around the back of the engine. It doesn't fit. The firewall's in the wrong place. The heater core's not where Honda thought it'd be. You can't use the factory hard line and you need a different way to get coolant back to the block. This Hybrid Racing fitting slips into the opening on the thermostat housing and gives you a 5\/8 inch hose barb. Now you're running a rubber hose straight from your heater core to this barb. No hard line. No trying to bend pipes that won't bend. You get two stainless steel brackets in the kit (one flat for PRB engines, one notched for RBB\/RBC\/R40 engines) and an O-ring. The fitting slips in, the O-ring seals it, and the bracket clamps it down so it's not vibrating loose or pushing out from coolant pressure. That's it. You can also use this on the factory chassis if you're turbocharging your RSX or Civic Si and you want to delete the factory hard line. Works on K swaps into EG, EK, or DC chassis too if you want a cleaner engine bay or you're going turbo.\u003c\/p\u003e\n\n\u003ch4\u003eHere's Why the Factory Hard Line's a Problem\u003c\/h4\u003e\n\n\u003cp\u003eHonda designed that steel hard line for a K series sitting transversely in an RSX or a Civic Si with the heater core in a specific spot on the firewall. When you put that same engine into an S2000, it's rotated 90 degrees and the heater core's nowhere near where it used to be. The hard line doesn't reach. It hits the frame rail. It's in the way of your turbo manifold. You can't use it. Same thing happens when you swap a K into a Miata or an NSX or a Lotus. The engine's oriented differently and the coolant routing Honda designed for a Civic doesn't work anymore. You need a barb on the thermostat housing so you can run a simple rubber hose from wherever your heater core ended up. That's what this fitting does. It's not just for crazy swaps either. We've seen people use this on EG and EK K swaps because they don't want the factory hard line cluttering up the engine bay. We've also seen it on turbo RSXs and turbo Civic Sis where the factory hard line's in the way of the hot side piping or the turbo itself. If you need a 5\/8 inch barb on the thermostat housing for any reason, this fitting handles it.\u003c\/p\u003e\n\n\u003ch4\u003eTwo Brackets Because PRB and RBB Housings Aren't the Same\u003c\/h4\u003e\n\n\u003cp\u003eYou're getting two stainless steel brackets with this kit and you're using one of them. The flat bracket's for PRB engines. That's K20A2, K20A3, K20Z1, and K24A1. The notched bracket's for RBB, RBC, and R40 engines. That's K20Z3, K24A2, K24A4, K24A8, K24Z1, K24Z2, K24Z3, and K24Z7. The reason there's two brackets is because the thermostat housing's shaped differently between those two engine families. The notched bracket's cut to clear the RBB\/RBC\/R40 housing shape. The fitting slips into the opening on the thermostat housing. You drop the O-ring in to seal it. Then you bolt the bracket down and it clamps the fitting in place. The bracket keeps the fitting from vibrating out or getting pushed out when the coolant system's pressurized. Slip it in, seal it, clamp it down, run your hose, and you're done.\u003c\/p\u003e\n\n\u003ch4\u003eWhat You Get\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003eHybrid Racing 5\/8\" barb coolant return fitting\u003c\/li\u003e\n  \u003cli\u003eBillet aluminum fitting with 5\/8 inch hose barb\u003c\/li\u003e\n  \u003cli\u003eSlips into K series thermostat housing opening\u003c\/li\u003e\n  \u003cli\u003eTwo stainless steel retention brackets (flat for PRB, notched for RBB\/RBC\/R40)\u003c\/li\u003e\n  \u003cli\u003eO-ring seal included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eFits These Engines\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003eK20A2, K20A3, K20Z1, K24A1 (use flat bracket)\u003c\/li\u003e\n  \u003cli\u003eK20Z3, K24A2, K24A4, K24A8, K24Z1, K24Z2, K24Z3, K24Z7 (use notched bracket)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch4\u003eCommon In These Cars\u003c\/h4\u003e\n\n\u003cul\u003e\n  \u003cli\u003e2002-2006 Acura RSX Base\/Type S\u003c\/li\u003e\n  \u003cli\u003e2004-2008 Acura TSX\u003c\/li\u003e\n  \u003cli\u003e2009-2014 Acura TSX\u003c\/li\u003e\n  \u003cli\u003e2003-2007 Honda Accord (K24)\u003c\/li\u003e\n  \u003cli\u003e2008-2012 Honda Accord (K24)\u003c\/li\u003e\n  \u003cli\u003e2002-2005 Honda Civic Si\u003c\/li\u003e\n  \u003cli\u003e2006-2011 Honda Civic Si\u003c\/li\u003e\n  \u003cli\u003e2012-2015 Honda Civic Si\u003c\/li\u003e\n  \u003cli\u003e2002-2009 Honda CR-V\u003c\/li\u003e\n  \u003cli\u003e2010-2014 Honda CR-V\u003c\/li\u003e\n  \u003cli\u003e2003-2011 Honda Element\u003c\/li\u003e\n  \u003cli\u003eK swaps into S2000, Miata, NSX, Lotus, EG\/EK Civic, DC Integra\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e Fitting slips into thermostat housing opening and is secured with stainless steel bracket and O-ring (does NOT thread in). Use flat bracket for PRB engines (K20A2\/A3\/Z1, K24A1) and notched bracket for RBB\/RBC\/R40 engines (K20Z3, K24A2\/A4\/A8, K24Z1\/Z2\/Z3\/Z7). Works with 5\/8 inch ID rubber coolant hose.\u003c\/p\u003e\n\u003c\/li\u003e\n\n \n\u003cli id=\"VehicleFitment\"\u003e\n 2002-2006 Acura RSX Base\/Type S\u003cdiv\u003e2004-2008 Acura TSX\u003c\/div\u003e\n\u003cdiv\u003e2009-2014 Acura TSX\u003c\/div\u003e\n\u003cdiv\u003e2003-2007 Honda Accord (K24)\u003c\/div\u003e\n\u003cdiv\u003e2008-2012 Honda Accord (K24)\u003c\/div\u003e\n\u003cdiv\u003e2002-2005 Honda Civic Si\u003c\/div\u003e\n\u003cdiv\u003e2006-2011 Honda Civic Si\u003c\/div\u003e\n\u003cdiv\u003e2012-2015 Honda Civic Si\u003c\/div\u003e\n\u003cdiv\u003e2002-2009 Honda CR-V\u003c\/div\u003e\n\u003cdiv\u003e2010-2014 Honda CR-V\u003c\/div\u003e\n\u003cdiv\u003e2003-2011 Honda Element\u003c\/div\u003e \n\u003c\/li\u003e\n\n\n\n\n\u003cli id=\"TechnicalData\"\u003e\n5\/8\" Hose Barb Fitting\n\u003c\/li\u003e\n\n\n\n \n\u003cli id=\"Included\"\u003e\n(1) 5\/8\" Barb Coolant Return Fitting\u003cdiv\u003e(1) PRB Thermostat Case Bracket\u003c\/div\u003e\n\u003cdiv\u003e(1) RBC Thermostat Case Bracket\u003c\/div\u003e\n\u003c\/li\u003e\n\n\n\n\n\n\n\n\n\n\n\n\n\u003c\/ul\u003e\n","brand":"Hybrid Racing","offers":[{"title":"Default Title","offer_id":45336087134242,"sku":"HYB-CRP-01-07","price":29.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2218\/5701\/files\/HYB-CRP-01-07_zl93.jpg?v=1778001709","url":"https:\/\/www.hybrid-racing.com\/products\/hybrid-racing-k-series-5-8-inch-hose-barb-coolant-return-fitting","provider":"Hybrid Racing","version":"1.0","type":"link"}