The AMS EVO VIII/IX Lower Intercooler Pipe is a light weight replacement for the restrictive factory piping. The stock pipe makes extra bends and necks down to less than 1.5" at one point. This pipe flows smoothly and without restriction from the turbo outlet to the intercooler. It also has an integrated factory inspired aluminum support used to prevent the pipe from blowing off under high boost. Through AMS's extensive parts prototyping and dyno testing programs they have found that replacing the lower pipe alone is worth 7-10 HP.