Our company is the branch of Ducksan Boring industry Co.LTD which is in Korea ,we starts from engine repair work since 1970, in nowadays, we specialized in retrofitting ,developing and manufacturing CNG/LPG/LNG /common rail engine, diesel engine and engine parts(new and rebuilt cylinder head, cylinder block, camshaft, crankshaft, valve, rocker arm, piston, piston ring, connecting rod, crankshaft, bearing, gasket set ,turbo charger, injector sleeve, timing belt) ,High quality, competitive price., we will send you the offer upon your specific request,