SBC Stealth 4150 4 Barrel Fuel Injection Conversion Kit, Sniper EFI The Sniper Stealth 4150 EFI system from Holley features 4, 100LB/HR Fuel Injectors capable of supporting up to 650 HP naturally aspirated or 600 HP on forced induction applications. The Sniper... MSRP: Was: Price: Now: $1,959.95 Quick view View Options SKU: 550-870K