Hours of operation: Monday-Friday 10-4 PM EST. * Before contacting us, please be sure to check out our EFI introduction section by clicking here. Most general questions are answered in our EFI introduction. Phone: 1-888-236-9831 - All calls are forwarded to voicemail. All technical support & order status inquiries must be submited via email. For sales inquiries please leave a voicemail & we will call you back as soon as possible. Email Form: Contact Name: Phone Number: Email Address: Question: