AEM 30-3351 Water Meth Kit – Key Features & Functions
Complete 5-Gallon Injection System
Everything you need:
- Large 5-gallon reservoir for extended use
- High-pressure injection pump
- Lines, fittings, and hardware included
Because refilling constantly gets old fast.
Multi-Input Progressive Controller
Advanced control system:
- Adjust injection based on boost pressure
- Supports additional inputs (MAP, MAF, etc.)
- Progressive delivery for smooth operation
No on/off nonsense—this is controlled power.
On turbo Diesel truck applications, water/methanol injection systems reduce air inlet temperatures and beef up combustion efficiency which allows the engine to deliver more power with less effort. It also offers a host of benefits that promote engine longevity, including the reduction of carbon deposits left by a Diesel’s exhaust gas recirculation (EGR) system.
High-Pressure Injection Pump
Delivers consistent flow:
- Ensures proper atomization
- Maintains pressure under boost
- Supports high-performance setups
Because poor atomization = poor results.
AEM’s Water/Methanol Injection Systems for turbo Diesel and naturally aspirated HD trucks utilize the most robust hardware combined with more advanced features than any other comparably priced water/methanol system. AEM’s on-demand progressive Multi-Input controller for AEM’s Diesel Water/Methanol Injection kit features a a couple of input design that enables users to install AEM’s Water/Methanol Injection Kit on ultra-high boost turbo Diesels (above 40 PSI) the usage of an external MAP sensor.
Improved Combustion Efficiency
Performance benefits:
- Lower intake air temperatures
- Reduced detonation risk
- More aggressive tuning capability
More power—safely.
The Multi-Input controller works with an external 0-5v voltage-based external MAP sensor, a frequency based input for Injector Duty Cycle (IDC), frequency-based mass airflow (MAF), or a 0-5v voltage-based MAF to make sure the correct amount of water/methanol injection at all points along the engine’s power curve.
Supports Higher Boost Levels
Unlocks potential:
- Allows increased boost pressure
- Improves consistency under load
- Reduces heat soak
Because heat is what limits your setup.
AEM’s engineers spent extensive time developing the HD water/methanol controller’s drift keep an eye on strategy for a more linear drift output delivery. Which means that the drift delivery better matches an engine’s need for water/methanol injection, which further improves charge air cooling and reduces EGTs.
Reliable AEM Engineering
Built for performance:
- Proven system reliability
- Durable components
- Designed for real-world use
Because this isn’t a “maybe it works” upgrade.
Why You Need This AEM 30-3351 Water Meth Kit
If you’re running boost and want to push your setup further safely, this is one of the best upgrades you can make.
The AEM 30-3351 V2 Kit gives you:
- Lower intake temps and increased efficiency
- Knock suppression for safer tuning
- Ability to run more boost and power
- Advanced control with multi-input system
Because power is great—until heat ruins it.
The new HD controller design features large, turn-resistant knobs and larger numbering to easily set accurate start and full activation points, with covered status LED and test buttons for added splash resistance. The Multi-Input controller has an easy-to-remove plug covering the programming dipswitches and a programming legend on the back for the 0-5v and frequency based settings, an easy to access integrated fuse and molded mounting tabs.
Ideal Applications
- Turbocharged builds
- Supercharged setups
- High-performance street cars
- Track and race builds
- High-boost applications
Multi-Input, 0-5V/frequency-based progressive controller design to be used with external MAP sensor for boost or MAF/IDC on high compression NA gas vehicles
Multi-Input controller features large adjustment knobs, integrated plug for harness connection, integrated fuse, covered status light and test buttons for enhanced splash resistance and mounting tabs
Wiring harness is terminated with a positive-lock connector on one end with color-coded wires to ease installation, power and ground wires for the pump and additional wire for optional on/off fluid solenoid
Internally-bypassed water/methanol injection pump does not cycle on/off and provides quiet, smooth operation; it features robust construction including integral hose fittings
Precision-machined billet-aluminum injector with integral check valve; three interchangeable injector nozzles to cover all kinds of HP levels
Final Verdict
The AEM 30-3351 V2 Water/Meth Injection Kit is a serious upgrade for serious builds.
It increases power potential, improves safety, and gives you the control needed to push your setup further without risking your engine.
Because controlling heat is how you unlock real performance.
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