12-135 In-Tank RetroFit Fuel Module 525 LPH

Name: 12-135 In-Tank RetroFit Fuel Module 525 LPH
Brand: HOLLEY
SKU: 510-12-135
Price: 899.95 USD
Availability: InStock

^$899⁹⁵

Ships on 09/11/2026

Lowest Price Guarantee

525 lph Pumps

In-Tank RetroFit Fuel Module

525 lph Pump

Supports Up To 1,200 HP EFI or 1,450 HP Carb

4.800 in. Diameter

1/4 in. NPT Ports

Billet Aluminum Module

Returnless-Style Fuel System

Includes Hydramat

Breakdown of Included Items

Features:

Converts factory fuel tank or fuel cell to an in-tank EFI fuel system quickly and easily
Supports up to 1,200 HP on EFI applications or 1,450 HP on carburetor applications (60 PSI at 13.5 V / 16.9 AMP draw)
525 lph pump
1/4 in. (.250) NPT ports
Returnless-style fuel system
Use with gasoline or E85
Installs in any fuel tank from 7.500 in. to 12 in. depth
Low-profile design is only 1.275 in. thick above the tank surface for added clearance
An innovative clamping system allows locating the module anywhere in the tank beside an existing sending unit
3 in. x 15 in. Holley Hydramat ensures consistent fuel supply with a mounting flange containing (6) clocking pin locations that allow for 360-degree adjustment to clear sending unit levels, any tank floor restrictions, plumbing and wiring locations
Black anodized aluminum construction
Note:
- Maximum size of 6 AN lines and fittings due to space limitations between unit and fuel tank
- Recommended to use 30 amp fuel pump relay along with 12 gauge minimum wire size

Drop-In Retrofit EFI Fuel System

Are you interested in an EFI retrofit kit, but just can't get past the complexity of the fuel system? Holley's Universal In-Tank Retrofit Fuel Modules are available in return and returnless versions to quickly and easily convert your factory tank or fuel cell to an in-tank EFI fuel system using only basic tools; no welding or metal fabrication is necessary. Each low-profile aluminum module includes a pump hanger bracket to control pump vibration along with an innovative clamping system that allows it to be positioned in the tank near the existing sending unit. Once installed, simply hook-up the fuel lines, power source, and ground; then you're ready to run!

Part TypeFuel Pump Module Assembly

Product LineHolley In-Tank RetroFit EFI Fuel Modules

BrandHOLLEY

Package Height5.8

Package Width6.06

Package Length18.25

Weight3.5 PG

Part CategoryPerformance Parts

Outlet Quantity (# Of Ports/Lines)2

Outlet Diameter0.25 in (6.4 mm)

QuantitySold individually

Inlet TypeStrainer