The IS Series intake for the 02-07 Subaru WRXAnd STI is an easy to install short intake system. By reducing turbulence and providing a less restrictive flow through the high performance filter, each short ram intake system is engineered to provide improved horsepower and torque gains over the stock setup. Expect faster turbo spool and a nice burbling sound under the hood. Each 6061 T-6 aluminum alloy intake is finished off with an Injen performance dry air filter with built-in velocity stack. Includes stainless steel clamps, high quality silicone hoses, and instructions.