Spool FX-350 Upgraded High Pressure Pump Kit [M133]

The Spool Performance FX-350 is a cutting-edge high-pressure fuel pump engineered for high-performance Mercedes-AMG M133 engines, such as those found in the CLA45, GLA45, and A45. This advanced fuel pump delivers more fuel at higher pressures compared to previous models, significantly boosting fuel flow, atomization, and overall engine performance.

Enhanced Performance:

• 35Mpa Fuel Pressure: The FX-350 increases fuel pressure to 35Mpa, compared to the 25Mpa of the previous FX200 model. This ensures a higher flow rate to the injectors, allowing 40% more fuel delivery before hitting the limits of the injection window.
• Improved Fuel Atomization: Higher fuel pressures promote finer fuel droplet atomization, which improves combustion efficiency, power output, fuel economy, and reduces emissions. The fuel mixes more thoroughly with air, enabling a more complete burn in direct-injected engines.

Why Do You Need It?

The stock high-pressure fuel pump (HPFP) on the M133 engines has a limited capacity when trying to tune and raise power. The FX-350 adds 90% more flow, raising the fueling limits and allowing you to run larger turbos and higher ethanol concentration blends. This is essential for those aiming to unlock the full potential of their AMG.

What’s Included in the Kit:

• 1x FX-350 Upgraded High-Pressure Fuel Pump: Delivers up to 90% more fuel flow for higher power potential.
• 1x Ethanol Content Monitor Kit (Optional): Includes a mobile app with real-time ethanol content and fuel temperature monitoring.
• 1x Bosch Spec 10-Micron High-Flow Fuel Filter: Ensures clean fuel reaches the engine with no noticeable pressure drop.
• Upgraded Fuel Lines and Install Hardware: Braided steel, PTFE core fuel lines with a black nylon coating, 100% E85 compatible.

Additional Features:

• Spool 10-Micron Filter Unit: Provides industry-leading filtration for the Mercedes market, protecting your high-pressure pump and injectors from debris without any noticeable pressure drop.
• Spool Ethanol Content Monitor: Digital readout of in-tank ethanol content and fuel temperature delivered via BLE 4.0 low-energy technology, compatible with the SPOOL Ethanol Content Analyzer app for mobile devices.

Tune Changes Required:

The FX-350 upgraded fuel pumps require calibration changes to ensure safe operation. It is critical to apply these tune changes prior to starting the engine with the upgraded pumps to avoid damage. Spool Performance can provide calibration details to your tuner and offer assistance to ensure your setup is properly tuned.

Low-Pressure Fuel Pump Upgrade:

For optimal performance and durability, ensure your low-pressure fuel system is upgraded to meet the demands of the high-pressure pumps. Insufficient low-pressure fuel can cause damage to the pump piston and bore, leading to voided warranties. Proper planning of your fuel system is essential when upgrading.

Note: 'New' merchandise may be returned for exchange or refund within 15 days from the date of shipment. 'New' merchandise must be unused and free from installation or mounting damage. Installation or modification of parts waives your right to returns, refunds, or exchanges.