Products (26)

This is a set of GN1Performance "KB HEADERS" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. They feature HUGE ports...

This is a GN1Performance 3" Exhaust Test Pipe for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. This item is constructed...

This is a GN1Performance "3.5 INCH V-BAND DOWN PIPE" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. This is our all new 3.5" Inch V-Band Flange Downpipe constructed out of...

This is a GN1Performance 3" Exhaust Test Pipe for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. This item is constructed...

This is a GN1Performance "Stock Replacement Up Pipe" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. This item is a...

This is a Cold Case "ALUMINUM STOCK APPEARING RADIATOR" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. THIS IS A DIRECT DROP IN PLUG AND PLAY! This product...

This is a set of "BUICK V6 BLACK POWDER COAT WRINKLE FINISH VALVE COVERS WITH 45 DEGREE ANGLE AND POLISHED BILLET BREATHERS" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo...

This is a GN1Performance "  NEW MODEL 3" Cat Back Dual Exhaust System" for a 1986 or 1987 Buick Grand National, T Type, or Turbo T 3.8 liter turbo V6. This 3 inch exhaust kit comes complete with custom mufflers, mild steel...