Come to think of it, I have seen a photo of a used Perrin TMIC that had fin damage on the bottom side.
Hopefully not shooting myself in the foot.... there is a slightly used Spearco unit for sale here that I've been entertaining, but I've only read complaints about the whistling and the massive size. That got me thinking about the Perrin. My car is a DD and I don't have any immediate intentions of trying to make a bajillion HP. It bothers me that after an 18 minute highway commute, I pull into Starbucks and can see heat coming out of my hood scoop. I may be better served by getting a turbo and dp blanket and doing the bulletproof mod.