High-quality exhaust valves from Kibblewhite Precision Machining that fit Triumph 650 and 750 unit twins 1963-1982 including T120 and T140 Bonneviile as well as TR6 and TR7 Tiger models. Replacement for OEM # 70-2904. All KPMI Black Diamond Stainless steel valves are 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 on our computerized flow bench. Black Diamond Valves are lightweight, strong, one piece forgings with profiles that provide excellent flow characteristics.

NOTE: Sold individually, order quantity 2 for one cylinder head if both valves are needed