Spool FX-170 Upgraded High Pressure Fuel Pump System | SL63 AMG [M177] Ethanol Analyzer kit:I would not be installing an Ethanol Content Analyzer The stock HPFP on the

The stock HPFP on the M276 Motors is severely limited in capacity when trying to tune and raise the output of the motor

A flow rate that nearly doubles that of the OEM pump

The factory airbox restricts airflow and limits filtration surface area

Mercedes SL500 – 2004-2006

Featuring oversized couplers designed for better heat resistance and airflow

Spool FX-170 Upgraded High Pressure Fuel Pump System | SL63 AMG [M177] Ethanol Analyzer kit:I would not be installing an Ethanol Content Analyzer The stock HPFP on theSpool Performance FX 170 High pressure fuel pump upgrade What is the FX 170? The FX 170 is an upgraded high pressure fuel pump. The pump features a bigger bore size than stock that translates into roughly 50% more flow when compared to stock. The pump is completely E85 compatible and fully plug and play with no cutting or splicing of any kind required. The added flow will let you run much higher ethanol concentrations and also allow fueling for bigger