BMW N55 Custom Tune

GAP Tuning – BMW N55 Custom ECU Tune

Unlock the full potential of your BMW's N55 turbocharged inline-six engine with a custom ECU tune from GAP Tuning. Our tunes are precision-crafted on a per-vehicle basis, optimizing boost pressure, ignition timing, fuel delivery, and throttle response to deliver maximum power, torque, and drivability.

Vehicle Application:
Compatible with all BMW vehicles equipped with the N55 3.0L turbocharged inline-six engine, including:

• BMW 1 Series (F20/F21) – 135i
• BMW 2 Series (F22/F23) – M235i, M240i
• BMW 3 Series (F30/F31/F34) – 335i, 340i
• BMW 4 Series (F32/F33/F36) – 435i, 440i
• BMW 5 Series (F10/F11) – 535i
• BMW 6 Series (F06/F12/F13) – 640i
• BMW 7 Series (F01/F02) – 740i
• BMW X3 (F25) – xDrive35i
• BMW X4 (F26) – xDrive35i
• BMW X5 (F15) – xDrive35i
• BMW X6 (F16) – xDrive35i
• BMW Z4 (E89) – sDrive35i/is

Tune Options:

• Turbo: Available for Stock Turbo, Upgraded Turbo, or Full Frame (Top/Bottom Mount) turbo setups
• Fueling: Supports Stock Direct Injection (DI) or Port Injection with Reflex (PI/DI combo)
• Flex Fuel: Optional flex fuel calibration available for E30–E85 ethanol blends

What's Included:

• Custom ECU calibration tailored to your specific vehicle and modifications
• Optimized boost, timing, and fueling maps
• Flex fuel map (if selected)
• Ongoing revision support

Select your configuration from the options above and place your order. Our team will reach out to gather your vehicle details and modification list to begin your custom calibration.