so i did the ram air mod last night and i must admit, PITA! no problems running the pipe and cutting the hole.....i used a 4'' coupler where the irrigation pipe comes through the plastic core support area, that was the bittttch. getting that thing to clear the grill required A LOT of hacking. i might not be done with it yet b/c only about 1/3 if the 4 1/2'' coupler is sitting directly behind the mesh part of the grill, the rest of it isnt getting the direct "ram air" effect .... so i also made a cardboard piece painted it black drilled 2 holes on the back side of the grill and used black zip ties so it would direct more air into the tube lol. i siliconed inside and outside of the airbox where the pipe comes in with rtv-102 clear. im happy with how it turned out but im thinking im going to make an air damn out of sheet metal so i can get the best effect out of it. i had to button it up last night b.c. i was about 3.5 hours in with a few trips to lowes and it was getting late. pacs or a vides will be posted here when im completely done!