Product Details: Increase horsepower and style under the hood of your Evolution! Our designers have released a system for the EVO that is not only value priced, but looks great and prevents any issues associated with nasty Check Engine Lights. You will see consistent gains in horsepower, throttle repsonse and fuel economy. Our kit includes a power-coated cold rolled steel heat shield to prevent heat soak and a high-flow foam filter. Fits all models 2003-06.