Level 1 2024+ Mustang GT / Dark Horse Return Style Fuel System (Stock Manifold)

The Level 1 Return Style Fuel System from Lethal Performance was designed for 2024+ Mustang GT and Dark Horse owners looking to support higher horsepower and flexibility across pump gas, E85, and race fuel.

This system is a simplified return-style design using a single Aeromotive regulator. Fuel is supplied by our DivisionX triple pump hat, split via a Y-block to feed both the factory direct injection pump and the port injector rails. Fuel pressure is regulated on the return side and sent back to the tank for smooth, consistent operation.

This kit is compatible with Paxton, Procharger, single/twin turbo setups, and naturally aspirated builds. It comes with aftermarket DivisionX fuel rails.

Note: This version is designed specifically for the stock intake manifold. If you’re running a Whipple, Lethal Edition Whipple, Roush or VMP supercharger, use this version instead .

• DivisionX Triple Pump Fuel Hat: Drop-in replacement, supports 2 or 3 pumps, retains stock fuel level sender for accurate gauge operation.
• DivisionX High Flow Fuel Rails: Black anodized and designed to fit the 2024+ Mustang GT with stock manifold.
• Aeromotive Single Regulator: Mounted on the return side of the system for simple and reliable control of port and DI feed pressure.
• Pre-Assembled Fragola PTFE Fuel Lines: Odor-free, ethanol-compatible, and covered in a black abrasion-resistant coating.
• Lethal Performance Triple Pump Wiring Harness: Features 3 x 40A relays, quality wiring, and a fused battery connection for safe and easy installation.

While the system includes our standard triple pump wiring harness, upgrading to The Box gives you full control over when each pump activates—perfect for high-boost and triple pump builds.

The Box enables:

• Independent pump control based on RPM, boost, load, or external inputs
• Staggered activation to reduce electrical load during cruising
• Full compatibility with standalone ECUs and programmable fuel control strategies

Not required, but highly recommended if you're pushing 900+ WHP or running all three pumps full-time.

• DivisionX Triple Pump Fuel Hat (2024+ Mustang GT/DH)
• DivisionX High Flow Fuel Rails (Black Anodized)
• (2) Walbro F90000267 465LPH E85-Compatible Fuel Pumps
  (Optional: add a third pump for future growth)
• DivisionX High Flow Inline Fuel Filter (Stainless or Washable Element)
• Lethal Performance Return Style Triple Pump Wiring Harness
• (1) DivisionX 13143 Dual-Port Extreme Flow Regulator (Single)
• Pre-Assembled Fragola PTFE Fuel Line Kit (Black Coated)
• Fittings, Zip Ties, Vacuum Hose, Loom Clamps, T-Fitting & Mounting Hardware

• Designed for 2024+ Mustang GT & Dark Horse using the factory intake manifold.
• Works with Paxton, Procharger, single or twin turbo setups, and naturally aspirated applications.
• Fuel rails are included.
• Not compatible with Whipple, Lethal Edition Whipple, Roush or VMP superchargers. Use the dedicated version linked above.
• Minor bracket modifications may be required on custom turbo builds or tight engine bay configurations.

If you're looking for a clean, proven, and affordable way to support more power and run ethanol safely, the Level 1 Return System from Lethal Performance is your go-to solution for the 2024+ Mustang platform.

Looking for instructions? Click here.