Increase throttle response and decreases turbo lag 2. Hi FLow 6061 Aluminum Piping Direct OEM Replacement 3. Surface wrinkle thermal insulation spraying 4. Never blow up again 5.1/8 NPT Bungs for Meth or Nitrious Injectors 6. The aluminum pipe replaces the brittle factory plastic pipe which can fail under increased boost pressure. The increased piping size helps to reduce turbulence and maximize flow into the engine. We are all human beings, we all make mistakes so if you received a wrong item / missing item / or any other concerns regarding your orders please give us a chance to fix it first before leaving a bad feedback. We still aim for the best service and products so if you have any question or concerns please talk to us first! We are always here to help and we will do our best to make sure your problem is resolved in a fair and satisfied way. It is YOUR responsibility to pay for the custom duty not us. We have no control over your country`s custom department so we have no idea how much they charge.