Is your vehicle a LLY or LB7? Check the eighth digit of your VIN to find out. If it's a 2 you've got a LLY and you'll need this kit. If it's a 1 you've got an LB7 and need the 75-5101 kit. Our one piece air box design features an integrated box seal that keeps out unwanted engine heat. The cooler the air, the greater the density, resulting in better performance. Premium silicone seals won't tear or crack and can handle temperatures as high as 400?. Designed to fit better than the stock intake. You'll be breathing easy in 45 minutes.