T-1300-TRN - Thunder Tornado Air Kit - Air Kits are designed to give peak performance with a great custom appearance. All kits include the proper K&N filter for optimum air flow. The optional Thunder Stage 3 Jet Kit completes the package. During development, our Air Kits undergo countless hours of testing at the DynoJet research facility and now at the new Thunder Mfg research facility to insure peak performance, fuel economy and ease of tuning for a specific application.