Overall these are great especially at the price. The ones I received are mad from aluminum. The paint on them isn’t the best but it isn’t bad either. The fit is a bit imperfect but they line up good enough that you can’t tell unless really looking. (This could vary from year model differences on iroc hoods but im not sure.)The only thing I didn’t like about these louvers was the way they set down into the hood. The top of the louvers sits about 1/2 inch under the normal area of the hood. This is due to the iroc indentation for the much thicker plastic inserts.To fix this to my liking I ordered some 1/2 square weather seal and some plastic spacer of varying sizes for m3 stainless screws(which I used in place of the provided rivets along with riv nuts). I stuck the weather seal onto the underside of louvers, cut a tape near the front edge until it sat even with the rest of the hood. Then I drilled through the seal where the holes needed to be and open those holes from the underside until the plastic spacer fit into th seal snuggly and would fall out. I mounted it with stainless m3 countersunk bolts into m3 riv nuts.Even without my modifications I would have been satisfied with the product but with modifications I am extremely happy with it.