I put a V8 Mercedes Benz air box on my Crossfire it fits perfect and has larger filters and air chambers and I could notice the difference, no dyno just feel! I have 29k miles on my car and I put it on with around 27k. So I can tell a difference in seat of your pants pull. I’m going to look into a mold from it! Or you can just order from Benz or look for a used one! I paid $150 including the K&N’s for it.