Fit For MK4 Fit For GTI Fit For 1.8T Cold Air Intake Intercooler 1J0145803 Aluminum Intercooler. An efficient intercooler system directly contributes to improved fuel economy by enabling a more complete and optimized combustion process within the engine. This component reduces the emission of harmful pollutants like nitrogen oxides by maintaining lower combustion temperatures and promoting cleaner burning. Streamlined internal design supports effective cooling, adapting well to high-load driving. Sturdy build quality offers steady heat dissipation with a reduced failure rate., Manufacturer: HGDDBAE