hi those things do not work..think about it the air commes in at xxxcfm's per minutes then it slams into airfilter and all that convoluted twists in the housing, then slam into spiral thingy, which is supposed to make it twist, in to throttle valve , then past restriction in plenum neck, then into flattened area, then it gets split into six different passages, then into restrictive space right at fuel injector, then into valve areas then sucked into piston and detonation and out she goes. there is no way that it can possibly keep that spiral going on all those rough surfaces going down.. thats why poeple port and polish.. i do not think they wok save your money and port polish your exhuast manifolds or other easy proven mods.......good luck
ps forgive my somewhat nontech description of air flow .. i am not engineer...
1986 Pontiac Fiero SE, 67k original miles, V6, Auto, AC, PB, PDrlks,Pwr windows, Sunroof, Silver body and black aero/gt trim, Factory Aero nose,Factory Wing and Alloy Wheels, 205-14-70, Optional Factory Guages. Mostly original stock. Remember those who serve our Country! currently under going minor repair/over winter project.