100% Genuine NGK,HKS plugs made in Japan.The item will be shipped within 3-5 business day after the payment is received.We cannot accept for return or replacement any item,unless it arrived damaged.If you have any problem, please contact us. Your satisfaction is important to us.If you need wholesale discount in NGK Racing Spark Plugs & HKS Super Fire Racing Spark plugs, please email to us . Transaction will be ended when buyer will be satisfied and leave feedback. Please do not hesitate to contact us on any question. Usually we respond to your e-mail within 7days.