Spool Performance FX-170 Upgraded High Pressure Fuel Pump System | SL63 AMG [M177]

Enhance the fueling capabilities of your Mercedes-AMG SL63 M177 with the Spool Performance FX-170 High Pressure Fuel Pump System. Designed for performance enthusiasts and tuners alike, the FX-170 delivers a significant 50% increase in fuel flow compared to the factory pump, supporting high ethanol content and larger turbo applications—all in a fully plug-and-play package.

What is the FX-170?

The FX-170 is an E85-compatible upgraded high-pressure fuel pump system that features a larger bore size over stock, delivering approximately 50% more fuel flow. This increased capacity ensures that your engine receives sufficient fuel for power upgrades, including higher ethanol concentrations and bigger turbo setups. The FX-170 is a direct replacement that requires no cutting, splicing, or modifications for installation.

Why Do You Need It?

The factory high-pressure fuel pump (HPFP) in the M177 engine becomes a critical bottleneck when increasing engine output. Whether you're pushing more boost or incorporating ethanol into your fuel system, the FX-170 allows for higher performance limits by:

• Delivering 50% more flow over stock

• Supporting E85 fuel compatibility

• Enabling larger turbo and high-power builds

• Maintaining plug-and-play convenience for easy installation

What’s Included in the Kit:

• 2x FX-170 Upgraded High-Pressure Fuel Pumps

• 1x Bosch-Spec 10-Micron High-Flow Fuel Filter

• 1x Ethanol Content Monitor (optional) with Mobile App Support

• Upgraded E85-Compatible Braided Fuel Lines

• All Required Installation Hardware

Spool 10-Micron Fuel Filter

Designed specifically for the M177 platform, the included 10-micron filter offers top-tier filtration with no measurable pressure drop in the low-pressure system. It plays a vital role in extending the life of your injectors and HPFP by preventing debris contamination.

Spool Ethanol Content Monitor (ECA Kit)

The optional ECA kit offers real-time digital readouts of in-tank ethanol content and fuel temperature, viewable through the Spool ECA mobile app. BLE 4.0 connectivity ensures seamless use alongside other Bluetooth devices. The system also includes a 0–5V analog output for flex-fuel tuning integration. All fuel lines are 100% E85 compatible and built from braided steel with a nylon core for durability.

Tune Calibration Required

To ensure proper operation and prevent damage, the FX-170 requires calibration changes before startup. Spool Performance will supply calibration details to your tuner and can recommend experienced tuners familiar with the system. While Spool does not offer tuning services directly, their team is available to support your tuner with technical information.

Low Pressure Fuel Pump (LPFP) Considerations

High-performance fueling systems rely on strong low-pressure support. An underperforming LPFP can cause starvation, damaging the HPFP and injectors due to lack of proper lubrication from fuel. All damage from low-pressure fuel starvation is detectable and voids the product warranty. When upgrading your HPFP, always assess and upgrade your low-pressure fuel system as needed.

Reliable Power. Tuned for Precision.

With its perfect balance of flow increase, installation simplicity, and ethanol readiness, the Spool FX-170 High Pressure Fuel Pump System is ideal for SL63 AMG owners looking to take their performance to the next level without compromising on safety or reliability.

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.