Item fits all Golf models with 2.5L engine from 2010 and 2011. Unit has provisions for up to 2 oxygen sensors to accomodate all engine codes. 1 plug included if your model only has 1. Direct fit unit ensures proper fitment and easy exchange with OEM unit. OBDII-configured catalyst technology ensures proper performance, emissions, and no premature check engine light. Required exhaust sleeve clamp and gasket included FREE with purchase.