I just bought the GPI radiator and I paid 30 dollars to have the outlet changed. When my fab guy cut it off he said the hole in the radiator was only open about 25% of the size of the outlet. Said it looked like someone used a punch to put a hole in it. He opened it up for me. mounts for the louvers on the front didnt match up real well. Had to cut the un-necessary mount in the middle on the top because it hit my LSR steering stem. Its def. not just bolt in and go. You get what you pay for here.