Description
Torque Solution 06 21 Subaru STI EJ Big Bore Manifold Big Bore 76mm Throttle Body Adapter Black TS SU 870P BK Vehicle Model_STI evenly spaced pleat design which evenly spaced pleat design which produces more useable filter surface area for increased flow and greater dust holding capacity stock pipes have many bends which in some places are very tight radius which causes much resistance and pressure drop