For those seeking more power and better throttle response, Injen's short ram air intake systems are the right choice. Short ram air intake systems are the easiest to install and generally require less than one hour to complete installation. The IS-Series intake systems are the traditional air intake tube and filter system that has been popular for many years. Although they do not provide as much power as cold air intake systems, they are much easier to install and if used in conjuction with a heat shield, can produce almost as much power gain as comparable cold air intake systems. Most intake systems are offered in one piece designs. Mass Air Flow sensor equipped models feature two piece designs. Injen's SP-Series Short Ram Air Intake Systems are tuned for your specific application. Each SP-Series Air Intake System feature Injen's patented MR (Mega Ram) technology. MR technology allows the air intake system to be tuned within factory air-fuel ratios and optimized for maximum horsepower and torque gain. Every Injen air intake system is certifed or pending certification by the California Air Resource Board and backed by Injen Technology's limited lifetime warranty.