This is a GN1Performance "4" COLD AIR INTAKE SYSTEM DESIGNED TO ACCEPT A 3.5 MAF SENSOR" 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 ALL the hoses and clamps to work with your 3.5" LS1 MAF sensor. The kit includes a 4" MAF pipe, a 4" straight hose, (2) 4"-3.5" reducer hoses to adapt your LS1 sensor, a 4" connector pipe, all the stainless heavy duty t-clamps necessary, and a 4" K&N Air Filter.
***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.