AEM 99-00 Honda Civic Si Black Fuel Rail Ignition Coils - Upgrade The Walbro F90000262/273 pump uses

The Walbro F90000262/273 pump uses the same connectors as the OEM BMW pump

which is then cooled by engine coolant

IE engineers elected to use a resonator in the B9 A4 & A5 exhaust

Each shim is permanently secured using a stainless steel countersink screw and locking pinch nut — no more tape

oil flows mostly through the rebound ports in the piston (upper dotted arrow)

AEM 99-00 Honda Civic Si Black Fuel Rail Ignition Coils - Upgrade The Walbro F90000262/273 pump usesAEM High Volume fuel rails feature a 1 2 inch fuel bore to support fuel flow for applications up to 1,000 horsepower. This large bore also dampens backpressure pulses created by larger injectors and works perfectly with stock injector sizes. An additional 1 8th NPT port is included to accommodate a nitrous set up or fuel pressure gauge. A custom fuel line fitting is included for the factory fuel line, and in most cases the ends of each rail are pre