AIRTEC Motorsport Additional Fuel Rail for Focus Mk3 & Mk4 Cast Inlet Manifold UpgradeDesigned to fit solely with our AIRTEC Motorsport Mk3 Focus ST RS and Mk4 Focus ST cast inlet manifold upgrade, this fuel rail allows four additional top feed fuel injectors to be easily added. Working in conjunction with the cars original Direct Injection set up, this offers hugely increased fuelling capabilities that are required when pushing power to a much higher level. Machined from high quality aluminium and finished in anodised black, the fuel
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