This is a GN1Performance "TWIN TURBO INTERCOOLER" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. This the ultimate big horsepower kit for your Buick Grand National or Turbo T! The headers are built and designed for a 109 factory block, they work with factory iron heads or champion aluminum heads! These will NOT work on stage 2 heads! They feature HUGE ports, 1 5/8" tubing, and are welded all the way around each tube! These headers are only available in none polished raw stainless finish. The intercooler is a custom GN1Performance design. The only front mount on the market with 2 in and one out all in 3" diameter outlets. It is custom hand built aluminum twin turbo intercooler with the bar and plate core. The core itself is 24x7x3. Overall dimensions are 30x14x3. The inlets are 3" and the one outlet is 3".
***Due to the nature of this build there is some customization that will be required when installing these. Items like building a new exhaust and relocating the alternator. For recommendations feel free to give us a call.
*These are for competition use only modifications or adjustments maybe required