I, too, had the FRPP brace, and it did not fit over the plenum cover. I took the cover off but it always irked me that I paid extra for something that I couldn't enjoy. I bought the Bullitt one (pictured above) and it fits great, about 3/4" of clearance. It is the same as the FRPP V6 brace, only powdercoated silver, as far as I can tell.