The APR throttle body hose features a multi-layer silicone design and an EZ-Flow structure, offering an ideal upgrade from the standard OEM coupler. It links the inlet pipe to the throttle body on the 1.8 / 2.0 TFSI EA888.3 engines found in vehicles such as the Golf 7 GTI / R, Leon 3 Cupra, S3 8V, a..