This is a GN1Performance "HUGE 4" COLD AIR INTAKE SYSTEM" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6.
The kit includes a custom fabricated huge 4 inch aluminum pipe, 4" K&N air filter, and the hose and clamps. This is item is for buick owners who are running a stand alone fuel management system (fast, BIG stuff, etc)
***Please note, in order to run this large of a diameter intake pipe you will need to have the IAC sitting at a 45 degree angle. You can achieve this buy running the IAC Angle Boss adapter plate we sell, or running our 72mm TB which has the angle boss built into it.