Aeromotive 18403 Gen II Stealth Fuel Tank 340lph In-Tank EFI Fuel System

The Aeromotive 18403 Gen II Stealth Fuel Tank is a complete, direct-fit drop-in fuel tank solution designed to bring modern electronic fuel injection capability to classic Oldsmobile Cutlass (1970–1972) and Buick Skylark (1970) platforms. This tank eliminates the need for external fuel pumps, bulky inline filters, and complex plumbing by integrating all critical EFI fuel system components directly inside the tank.

The Gen II Stealth design features Aeromotive's upgraded in-tank module with a 340 lph (liters per hour) brushless pump, capable of supporting naturally aspirated and forced-induction EFI engines well into the 1,000+ horsepower range. The internal sump and reservoir design ensures consistent fuel delivery even under hard cornering, acceleration, and low-fuel conditions — a common weakness of factory carbureted tanks when adapted for EFI.

Key Features:

• 340 lph high-flow in-tank fuel pump — supports high-horsepower EFI builds
• Direct OEM-fit replacement tank — no cutting, welding, or fabrication required
• Integrated internal sump for consistent fuel pickup during aggressive driving
• Returnless or return-style EFI system compatible
• Constructed from durable steel with a corrosion-resistant coating
• Includes all necessary sending unit and fuel level sender components
• Compatible with modern pump gasoline and ethanol-blended fuels
• Gen II upgrade features improved internal module design over original Stealth series

Designed and manufactured in the USA by Aeromotive, the industry leader in high-performance fuel system components, the 18403 Stealth Tank is the cleanest, most reliable path to EFI conversion for A-Body Oldsmobile and Buick muscle car builds. Installation uses the factory tank location with no visible external modifications.