The CT Engineering Supercharger for the 2012-2013 Civic Si and Acura ILX adds approximately 65-70+ Horsepower at the wheels. The power delivery is very linear, increasing boost as RPMs increase. Expect very impressive mid-range throttle response and top-end performance. This Supercharger Kit is a complete “bolt-on” kit, requires no other engine modifications, however it does require Hondata FlashPro and the addition of Intake and Cat-Back Exhaust is Highly Recommended.