Top-tier 2D-mapped water-methanol injection kit with Dual Stage Technology for port-injected turbo and supercharged petrol engines. The Stage 3 EFI is Snow Performance's most precise system — it creates a 2D injection map using both boost pressure and fuel injector pulse width to deliver exactly the right amount of water-meth at every load point. Dual Stage Technology controls two nozzles independently for maximum performance.

What's in the Box

• 300 PSI EPDM high-pressure pump (100% methanol-resistant, double-sealed)
• Stage 3 EFI controller with LCD display — 2D mapping via boost + fuel injector pulse width
• 2× Hyper-Sonic™ injection nozzles (primary + power nozzle) with integrated 100-micron filters
• Dual Stage Technology (DST) included — independent control of both nozzles
• 3-litre reservoir (black) with pump mount
• Fluid level switch with LED warning light (red)
• OEM-grade weather-tight wiring harness (terminated connectors)
• All fittings, pressure lines, and mounting hardware
• Comprehensive installation manual

Key Features

• Injection type: Variable 2D-mapped (boost pressure × fuel injector pulse width)
• Dual Stage Technology: Primary nozzle for everyday driving, secondary power nozzle activates independently at higher loads — optimal cooling at every RPM
• Display: LCD shows real-time boost pressure (BAR/PSI), fuel injection timing, and Boost Cooler injection volume (%)
• Engine compatibility: Port-injected (EFI) turbo/supercharged engines — Audi/VW 1.8T, Opel OPC, older TFSI, and similar manifold-injection engines
• Performance: Equivalent to running 116-octane race fuel at a fraction of the cost

How It Differs from Other Stages

Stage 3 EFI uses 2D mapping — it reads both boost pressure AND fuel injector timing to build a complete injection map. This is far more precise than Stage 2's single-axis boost control. EFI vs DI: Choose EFI for port-injected engines (1.8T, older TFSI, Opel Z20LEH). For direct-injected engines (MQB TSI, N55, EcoBoost), choose the Stage 3 DI instead.