Subaru STi Spec C Anti Surge Fuel Pump Assembly Chassis & Suspension_Wheel Bearings & Seals and is as fitted to

and is as fitted to JDM models as standard

These are Genuine OE Subaru Piston ring sets

Depending on requirement SamcoSport have developed various specialist liners for applications such as coolant

Modine Oil Cooler fitted to 2008+ UK STi

and highly accurate cam timing adjustments during engine setup or trackside tuning

Subaru STi Spec C Anti Surge Fuel Pump Assembly Chassis & Suspension_Wheel Bearings & Seals and is as fitted toThe Subaru Impreza fuel tank design is flawed particularly when running below half a tank of fuel. Its possible to encounter fuel surge on hard cornering and spirited driving as fuel moves around the fuel tank and away from the fuel pump. Fuel surge occurs when the fuel pump sucks in air as it is no longer submerged with fuel. This results in a fuel cut which from a driving perspective is quite aggressive as power from the engine is immediately cut.