{"product_id":"ross-nissan-rb-head-drain-adaptor","title":"Ross Performance Parts Nissan RB Head Drain Adaptor","description":"\u003ch2\u003eOverview\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eRoss Performance Parts Nissan RB Twin-Cam Head Drain Adaptor\u003c\/strong\u003e is designed to help control oil pooling at the rear of RB20, RB25 and RB26 cylinder heads on engines using upgraded oil pumps or sustained high-RPM operation.\u003c\/p\u003e\n\u003ch2\u003eWhy It Is Used\u003c\/h2\u003e\u003cp\u003eRoss identifies excessive top-end oil retention as a known RB issue when oil delivery exceeds the factory head-drain capacity. Excess oil can be pushed through the cam-cover ventilation system and, in severe cases, can reduce the amount of oil available in the sump.\u003c\/p\u003e\n\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDual-direction outlet for flexible hose routing\u003c\/li\u003e\n\u003cli\u003eFits the existing rear cylinder-head core-plug location\u003c\/li\u003e\n\u003cli\u003eRequires drilling\/tapping two M6 retaining holes\u003c\/li\u003e\n\u003cli\u003eLow-profile extended AN-8 fitting included\u003c\/li\u003e\n\u003cli\u003eAdaptor can be rotated to suit hose routing\u003c\/li\u003e\n\u003cli\u003eIntegrated mesh screen can provide a useful visual check for valvetrain debris\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\u003cp\u003eNissan twin-cam RB20, RB25 and RB26 cylinder heads.\u003c\/p\u003e\n\u003ch2\u003eImportant Oiling Note\u003c\/h2\u003e\u003cp\u003eRoss also recommends correctly sizing cylinder-head oil restrictors when upgrading the oil pump. The head drain should be treated as part of the complete oil-control strategy, not as a substitute for correct restrictor and sump design.\u003c\/p\u003e\n\u003ch2\u003eSupplier Part Number\u003c\/h2\u003e\u003cp\u003e306000-16\u003c\/p\u003e\u003ch2\u003eSupplier\u003c\/h2\u003e\u003cp\u003eRoss Performance Parts\u003c\/p\u003e","brand":"Ross Performance Parts","offers":[{"title":"Default Title","offer_id":43694981414979,"sku":"306000-16","price":89.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0703\/0659\/4883\/files\/306000-16-1_13.jpg?v=1787211607","url":"https:\/\/builtbyboostandtune.com.au\/products\/ross-nissan-rb-head-drain-adaptor","provider":"BUILT BY BOOST AND TUNE","version":"1.0","type":"link"}