Update: We Now Offer "Top Mount" and "Bottom Mount" options for all of our TL Jseries Supercharger Kits! Gerzy Bear Performance Rotrex Supercharger kits are available for all 2009-2014 Acura TL models (3.5L FWD 5AT/6AT & 3.7L SH-AWD 5AT/6AT/6MT). Our full supercharger kits are referred to by "Stages" based on your desired power level, intended fuel type (gasoline or e85 ethanol), and budget. Keep in mind that some kits may be more expensive because of their ability to run e85 ethanol which has properties similar to race fuels but with bigger fuel delivery requirements. You are viewing the specifications for a Stage 1 kit. The Stage 1 kit is pre-configured to run at ~7 psi boost pressure on 91 through 94 octane gasoline and dyno around 410-430hp at the wheels (through a 3.7L 6 speed manual on 93 octane or higher). A 3.7L or 3.5L engine with a 5 or 6 speed automatic transmission will dyno at slightly less power and torque due higher parasitic losses associated with the heavier components inside of any automatic transmission. This kit is NOT e85 ethanol compatible due to fuel supply flow limitations. For e85 compatibility, please see the Stage 1.5 kit. Precat Deletes (any brand of your choice, excluding HFPC core style) and Ktuner are both prerequisites for this kit. After installation, a custom tune by a 4G TL tuning professional of your choice such as Derek at IMWTuned.com for remote (emailed) "eTuning" and/or his physical Dyno Tuning services in Carlisle, Pennsylvania are essential. All of our full supercharger kits are designed to install on the Acura TL with very little modification to the vehicle aside from the trimming of some non-externally visible front bumper cover plastics. Top Mount style kits RETAIN Factory Air Conditioning (AC). For Bottom Mount kits - you are able to reinstall Air Conditioning using our AC line kit which is offered as an option on this kit above. Additionally, you will need to independantly purchase either a Treeligo (12V18CC) or Benling