Aeromotive VaporWorx DualX OEM Ally Returnless Pulse Width Modulation Fuel Module Controller Kit

The Aeromotive VaporWorx Ally DualX OEM Returnless Pulse Width Modulation Controller Kit (part number 66182, legacy VaporWorx part number PWALLY-DUALXFM) is engineered for vehicles with an OEM Fuel System Control Module (FSCM) or aftermarket ECM pulse driver that need a second fuel pump module added to the system. Part 66182 allows the OEM FSCM to control the primary fuel pump module while the VaporWorx Ally DualX controller piggybacks on the same signal to drive a secondary module in perfect synchronization.

This design is ideal for builders targeting high horsepower goals where a single OEM fuel module is no longer sufficient, but full OEM FSCM CAN feedback, diagnostics, and safety systems must be preserved. Common applications include high-output Ford Coyote Mustang builds (all generations using OEM FPDM), Chevrolet platforms with an OEM FSCM, and Cadillac CTS-V2 builds using aftermarket high-flow pumps such as AEM or DeatschWerks DW300 in both fuel module positions.

Part 66182 supports both pulsed positive (standard on nearly all GM and most OEM systems) and pulsed pull-to-ground signal inputs, eliminating the need for a separate relay or signal inverter in most configurations. All FSCM CAN diagnostics remain fully functional, and the controller eliminates the MIL codes caused by overloading the FSCM when a second high-output pump is added through conventional wiring. Only a single 20-gauge wire connects to the FSCM pulsed pump wire, and then battery power in and fuel module power out completes the installation. No relays, Hobb's switches, or additional fuses are required beyond what is included in the kit.

The Ally DualX controller (66182) delivers a 40A minimum continuous power rating in a compact 4 in x 2.1 in x 1.625 in housing. Over-temperature shutdown with automatic reset and short-circuit protection with automatic reset ensure the controller can operate indefinitely without damage. Operating voltage range is 10 to 22V, compatible with voltage boosters. Wiring uses cross-linked polyethylene wire and UL94-rated components throughout, with OEM Delphi/Aptiv sealed connections where applicable.

What's Included

• 1 VaporWorx Ally DualX PWM controller (part 66182)
• Pre-wired 20-gauge signal input lead (grey wire)
• Battery power input harness
• Fuel module output harness (Pump 1 and Pump 2 leads)
• OEM Delphi/Aptiv connector terminals and seals
• Full wiring harness with cross-linked polyethylene wire
• Hardware and fusing (40A minimum)

Compatible Vehicles and OEM Systems

Specifications

Frequently Asked Questions

What is the difference between the Aeromotive 66136 and 66182?
Part 66136 (BoostWorx) is a fully stand-alone controller that replaces the OEM FSCM entirely, used for single pump module setups like a Gen5 ZL1. Part 66182 (Ally DualX) is a piggyback controller that works alongside the OEM FSCM, adding a second pump module while keeping all FSCM diagnostics and CAN communication intact. Use 66182 when you need a second pump module and want to retain your OEM FSCM.

Does the Aeromotive 66182 work with Ford FPDM equipped Mustangs?
Yes. Part 66182 supports positive pulse and pull-to-ground pulse signals, making it compatible with Ford Fuel Pump Driver Module (FPDM) equipped Mustangs from the S197 platform and forward. Fuel module plug wiring changes may be required for Ford applications. Confirm your specific year and fuel module type with Aeromotive before installation.

Will the Aeromotive 66182 eliminate MIL codes on my CTS-V2 with upgraded pumps?
Yes. This is one of the most common uses for part 66182. Using the FSCM to drive one CTS-V2 pump module while the Ally DualX drives the second keeps total power within the FSCM's calibrated load envelope, eliminating the fuel pump-related MIL codes that appear when both pumps are powered through the FSCM alone.

What fuel pump modules are compatible with the Aeromotive 66182?
Part 66182 is compatible with OEM Gen5 and Gen6 Camaro ZL1 fuel modules, CTS-V2 OEM fuel modules (with aftermarket pump upgrades such as AEM or DeatschWerks DW300), Ford Coyote Mustang OEM fuel modules, and other OEM FSCM-equipped GM platforms. Fuel module plug wiring may need to be adapted for non-Camaro applications.

Does the Aeromotive 66182 require any programming or calibration?
No. Part 66182 requires no user programming, system changes, or adjustments. It reads the pulse signal from the OEM FSCM and mirrors it to the secondary fuel module automatically. The ramp rate, turn-on point, and operating parameters are all factory-set.

Can the Aeromotive 66182 work with aftermarket ECUs like Holley Dominator or Terminator?
Yes. For aftermarket ECMs that output a pulsed signal (positive or pull-to-ground), part 66182 acts as a high-power fuel pump driver module. Use the ECM's pulsed output to drive the controller, which then drives the fuel pump module. External pressure regulation is typically required when using an aftermarket ECM without a native pressure feedback loop.

Is an inline fuel filter required with the Aeromotive 66182?
Aeromotive strongly advises against using an inline filter with OEM fuel modules (except Gen3 Coyote GT500). Inline filters with built-in check valves can cause heat-soak overpressure conditions that can lock port-type fuel injectors. Final filtration is built into OEM fuel modules.

What is the warranty on the Aeromotive VaporWorx 66182?
Aeromotive warrants part 66182 for 1 year from the date of purchase with proof of purchase. Contact Aeromotive at 913-808-2376, option 3 to initiate a warranty claim.

Does the Aeromotive 66182 work on GM trucks with a factory FSCM?
Yes. GM late-model truck platforms originally equipped with a factory Fuel System Control Module are listed as compatible, though fuel module connector wiring changes may be required. Verify your specific truck's FSCM wiring configuration before ordering.

How many wires does it take to install the Aeromotive 66182?
The core signal connection is a single 20-gauge wire tapped to the FSCM's pulsed pump wire. Beyond that, it requires battery power in, and fuel module power out (positive and negative). No Hobb's switches, relays, or complex wiring beyond those three connections are needed.

California Prop 65 Warning

WARNING: This product can expose you to chemicals including lead, lead compounds, and other chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information go to www.P65Warnings.ca.gov.