{"product_id":"70-2904-bd-triumph-650-750-kibblewhite-black-diamond-exhaust-valve-1","title":"70-2904 BD - Triumph 650 750 Kibblewhite Black Diamond Exhaust Valve (1)","description":"Our go-to exhaust valve for cylinder head rebuilds in our shop! Fits all Triumph unit 650 \u0026amp; 750 twins 1963-82 and some pre-unit Triumph 500 \u0026amp; 650 twins up to 1962 (always check your parts book or call \/ email us prior to ordering for guidance) This KPMI® Black Diamond™ Stainless steel exhaust valve is impregnated by a special German process to a depth of .002, with a surface build up of .0002. This Black Diamond™ process improves wear properties, reduces friction, and provides resistance to corrosion and wear that is superior to chrome and nickel electrolysis plating. Each valve is designed using Finite Element Analysis software, and profiles are tested by Kibblewhite on a computerized flow bench. Black Diamond™ Valves are lightweight, strong, one piece forgings with profiles that provide excellent flow characteristics. Sold individually. Technical Specs: Standard: Head Diameter 36.58mm\/ 1.440\" * 7.9mm\/ 0.3100\" * Tulip 24º * Overall Length 3.780\" Oversize: Head Diameter 42.16mm\/ 1.660\" * Stem Diameter 7.9mm\/ 0.3100\" * Tulip 24º * Overall Length 3.760\" Click Here for inlet valves","brand":"Trophy Classic Cycles","offers":[{"title":"Oversize","offer_id":43223668260927,"sku":"TCC-70-2903-BD-OS","price":49.3,"currency_code":"USD","in_stock":false},{"title":"Standard","offer_id":43223668293695,"sku":"TCC-70-2903-BD-STD","price":49.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0661\/0350\/9055\/files\/70-2904_2520BD_2520black_2520diamond_2520valve_252001.jpg?v=1778173209","url":"https:\/\/www.trophyclassiccycles.com\/products\/70-2904-bd-triumph-650-750-kibblewhite-black-diamond-exhaust-valve-1","provider":"Trophy Classic Cycles","version":"1.0","type":"link"}