For Cummins ISB 5.9L. 6 x Fuel Injectors(As shown in the figure). We may contact you for additional verification if needed. Communication is the best way to solve problem. We will answer all questions and resolve any problems as quickly as possible. We try our best to reply to your emails as soon as possible, however, due to high volume of daily incoming emails and time zone difference, we may not be able to reply your emails immediately. Please give us the opportunity to resolve any problem. We understand the concerns and frustrations you might have, and will try our best to resolve the issues. We care about our valued customers, and will always try to help you.