The old ones were trash. Don’t buy the cheapies off amazon even if they have good reviews, go to the forums to see what actual enthusiasts buy. The old are ECOGard or something, way too restrictive and very weak, causing them to get sucked into the intake and bent. No bueno. I bought some K&N drop ins and the difference is shocking. Feels more powerful, definitely more mid-range torque and a more even power band. Overall very much worth the money.