Holley Fuel Module System In-Tank Retrofit Electric Fuel Injection Returnless 255 LPH With Hydramat

Eliminate any restrictions from your fuel system with a Holley 255 LPH In-Tank Retrofit EFI Fuel Module Returnless System (12-158)! This straightforward conversion clears space above your tank floor and sending unit for 360-degree adjustment. The included 3" x 15" HydraMat mounting flange features six clocking pin locations for consistent fuel supply. 

Features and Benefits:
- Straightforward In-Tank EFI Fuel System Conversion
- Supports up to 550 EFI or 700 Carb HP (HP Rating @ 60 PSI at 13.5 Volts / 10.4 AMP Draw)
- Fits 7” to 12” deep Fuel Tanks
- Low Profile Design (1.275" thick) Adds Clearance Above Tank
- Innovative Hydramat Clamping System for Module Relocation and 360-Degree Free Rotation
- Corrosion-Resistant Die-Cast Aluminum Construction
- 1/4” NPT Ports for a Wide Variety of Plumbing Options
- Ideal for Terminator EFI, Sniper EFI, MSD Atomic EFI or any TBI of EFI Conversion

The Retrofit module design includes a die-cast pump hanger bracket to control pump vibration while also providing a low profile design. An integrated fuel pump works with Holley's exclusive clamping system for a simple fuel line and power source/ground hookup.

Tech Tip: It is recommended to use a Holley 30 Amp Fuel Pump Relay (See P/N: HL12753) along with a minimum size of 12-gauge wire for your installation.

Please Note: There is a maximum 6AN line and maximum fitting size due to space limitations between unit and fuel tank.