My buddy & I installed AEM short ram intake on gsr. Its polished. It went pretty smooth except for the filter. Its like K&N rewashable. The bad thing is the inside lip I had to shave off for filter to fit. It finally fitted after that. You should not have to cut on anything for fitment. Anyways love the sound of the VTEC. The Vtec is not as loud w/ intake as like my B16A1 in my Civic . Look out for that problem if anyone order a AEM intake...