An autocross is also known as a Solo II event within the Sports Car Club of America (SCCA). It is basically a timed driving event where a competitor drives their car through a course defined by a set of cones. The course is usually set up on a location such as an empty parking lot or at an open air field. Each car is categorized into a class in which the driver will compete against other like vehicles for the best time. A time penalty is assessed for each pointed cone the participant knocks out of its location (2 seconds/cone).
A good source of information on autocrossing can be found on the Solo II Novice Handbook
Burger Tuning JB1 Install
The Burger Tuning JB1 piggyback unit is a simple item to install and provides a tremendous amount of horsepower and torque gains at a fair price. I currently have this installed in my 2016 VW Golf R.