subject: Make your car roar! [print this page] Heat shielding and coolants increase the efficiency of an induction kit even more. Cool air contracts, which means more can enter the engine than hot air. Specific instructions will vary wildly from vehicle to vehicle. While overall guidelines remain essentially the same, read your instruction manual carefully and alter the steps to conform to any specific differences in your car. Not all induction kits are legal in certain states or regions. Check your local laws and make sure the kit you install meets those parameters.