Injen Aluminum Air Filter Heat Shield (Black) - P/N: HS3500BLK Product Model: INJ-HS3500BLK UNIVERSAL - FITS 3.50" INJEN Air Filter Heatshield: Injen air filter heat shield designed to act as a deterrent against debris and water splashing to protect the air filter. Caution: This device is made to act as a repellent from heat or water only. Don't submerge in water or expose to extreme temperatures.