{"product_id":"mcs970644","title":"S\u0026S Twin Cam Breather Valve – 2003–2010 Dyna; FLT\/Touring with OEM…","description":"\u003ch2\u003eS\u0026amp;S Twin Cam Breather Valve – 2003–2010 Dyna; FLT\/Touring with OEM…\u003c\/h2\u003e\n\u003cp\u003eReed style breather to fit S\u0026amp;S oil pump as used in all S\u0026amp;S T-Series (Twin Cam style) engines and OEM pump in 03-10 OEM engines. Will tackle problems with OEM engines as Oil Carry Over (blowing oil out of the breather system); a common problem for years. Usually at sustained high speeds and worse with big inch engines. This problem can still be present in OEM Twin Cam engines. S\u0026amp;S designed this aluminum crankcase breather valve containing four steel reed valves; which effectively prevents wild turbulence in the cam chest and rocker boxes. Air and oil mist can escape from the crankcase; but is not allowed to re-enter. Any oil blowing out of the crankcase breather is stopped. A slight increase in horsepower (one to two HP) and torque can be expected. The breather valve is installed over the pinion shaft; inside the pinion bearing bore; and retained between the bearing outer retaining ring and the oil pump. Note: Will not fit TCB (Softail) models. Replacement parts: 970628Seal. 970629O-ring (for 99-02 FLT; Dyna). 970630O-ring (for 03-06 FLT; 03-05 Dyna). 970631Reed valve. 970632Reed valve stop. 970634Reed valve screws. 970610Wave spring (for 99-06 FLT; 99-05 Dyna with S\u0026amp;S pump). 970635Wave spring (for OEM \u0026amp; S\u0026amp;S cases with stock oil pump). 970636Wave spring (for S\u0026amp;S .375\" wider SA cases with stock oil pump). 970637Wave spring adapter (for S\u0026amp;S .375\" wider ''Special Application'' cases with S\u0026amp;S oil pump).\u003c\/p\u003e\n\u003ch2\u003eFitment\u003c\/h2\u003e\n\u003cp\u003e03-10 Dyna; FLT\/Touring with OEM cases; 99-17 style S\u0026amp;S T-series (Twin Cam style) cases (NU)\u003c\/p\u003e\n\u003ch2\u003eProduct Details\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e S\u0026amp;S\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCategory:\u003c\/strong\u003e MOTOR PARTS \u0026gt; BREATHER VALVES\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUnit:\u003c\/strong\u003e 1\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct code:\u003c\/strong\u003e 970644\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"S\u0026S Cycle","offers":[{"title":"Default Title","offer_id":44334663598400,"sku":"MCS970644","price":160.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1329\/4265\/files\/970644k.jpg?v=1785953012","url":"https:\/\/hogparts.co.uk\/products\/mcs970644","provider":"Hogparts UK Ltd","version":"1.0","type":"link"}