RCM Parallel Fuel Rail Kit / RCM Performance Fuel Regulator (UK, USDM & EURO SPEC MODELS) 53560-S04-013 If this is repeated

If this is repeated

launches its 4th generation

Machined from a high-quality thermal-resistant polymer

particularly on the creases

If component temperature isn't your problem

RCM Parallel Fuel Rail Kit / RCM Performance Fuel Regulator (UK, USDM & EURO SPEC MODELS) 53560-S04-013 If this is repeatedParallel fuel lines are a great addition to any engine, not only do they provide a more consistent volume of fuel to your injectors but they also yield key safety benefits. With Subaru's standard fuel system design, fuel is fed by a pump from the tank to the front of your car passing through the fuel filter (located in the engine bay) before being fed into the fuel rails. Fuel is then delivered to each cylinder one by one, starting with cylinder four.