Home/Custom EFI Carb Replacement Systems Holley Sniper EFI Conversion, self tuning with handheld. $1,529.50 Holley Super Sniper EFI for boost / nitrous, self tuning with handheld, 650hp $1,769.41 Holley Super Sniper EFI for boost / nitrous, self tuning with handheld, 1250hp $2,198.00 Holley Sniper Xflow EFI Conversion, 800hp, self tuning with handheld. $1,801.94 Holley Sniper Xflow EFI Conversion, 1375hp, self tuning with handheld. $2,287.93 Holley Sniper Stealth 4500 EFI for boost / nitrous, self tuning, 1500hp $2,430.93 Holley Sniper Stealth EFI Conversion, self tuning with handheld. $1,644.43 Holley Super Sniper Stealth EFI for boost / nitrous, self tuning, 650hp $1,930.43 Holley Super Sniper Stealth EFI for boost / nitrous, self tuning, 1250hp $2,359.43