Mine looks bigger than the one in the pics above... it was bit of a pig to fit and had wondered how or why a lot of other people said it was a simple 5 minute job. It wasn't until I searched on the forums, I found that there are 2 sizes / part numbers that people have fitted to their LCR's... one is the "correct" size, the other is too big and doesn't fit.
I didn't need to cut or modify anything. I found it easier to remove the battery to fit the cold air feed pipe, and I fitted the cold air feed pipe first, then I fitted the MAF to the other end, and then fitted the MAF into the silicone hose.