has anyone heard of these are they good products? i mean there not cheap for what they are ($60 on the net) here is the manufaturers description

IN-LINE AIR FILTER Optimizes air mixture to improve the performance of your air intake system Provides MORE POWER when you need it, less power when you don't Works in conjunction with your existing air filter. Installs between your primary air filter and throttle body along the tract of the air intake pipe. Efficiently controls air at different RPM ranges?takes in large volumes of air when you step on the gas, then safely levels off and switches to your primary filter as you cruise down the highway. Chrome-plated aluminum body, stainless steel screen, polyurethane second-stage filter element. Includes stainless steel fasteners, clamps. Applications: All Makes All Models

let me know what you think

 

there is no need for a second air filter. i don't care how good they say it is. i call bs all over that ****.