Located at the base of the fuel injector
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2012 Mercedes Benz S550 Base Sedan 221.173 V8 4.6L Engine Fuel Parts
The stock HPFP on the M278 Motors is severely limited in capacity when trying to raise the output of the motor. The FX-170 adds 50% more flow, raising the fueling limits and helping you achieve more power!
Includes O-ring - High Pressure Pump On Engine
Secures fuel pump into tank
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Includes injector seal
Located at the base of the fuel injector
One (1) Required Per Fuel Injector.