Grams Performance VW MKIV DBW Throttle Body - BlackA larger throttle body is key to producing additional power throughout the power band on modified engines with increased airflow demands. The new Grams Performance and Design MKIV throttle body features a large 70mm bore, which results in significant horsepower gains throughout the power band on heavily modified, naturally aspirated applications and even more on forced induction ones. This Part Fits: Year Make Model Submodel 2002 2003 Volkswagen Golf