Before making the jump to forced induction, Justin spent some quality time testing and tuning the car with various cold-air induction systems. At the time of our install, Rebecca's car wore a Roush CAI, which had to come off in favor of the induction supplied with the Roush kit. If you are working on a stock car, you'll just remove the stock airbox lid, clean-air tube, and Induction Sound Tube. The kit even includes a cap for the hole in the firewall vacated by the IST. You'll also want to remove the strut-brace if your car is so equipped, then pop off the engine beauty cover and remove the evaporative emissions hoses.