All intake parts are manufactured from 3 stainless steel that is ceramic coated for heat resistance and added beauty. Gains are claimed at 5-7 HP at the wheels on ABD test vehicle: 2005 Jetta MK5 2.5L. This 2- piece kit includes the fresh air intake tube and an ABD Racing big bore intake tube to relocate the MAF sensor. Not legal for use on pollution controlled vehicles operated on public streets/Race use only !