This is a GN1Performance "SPRING FOR A 46MM WASTEGATE" Please choose which you would like and make a note of it on the check out page. Each purchase is for ONE spring only. From right to left they are: 

1.Small red= 4.3 PSI

2.Small green= 5.8 PSI

3.Brown= 6.7 PSI (90% of the time this spring will keep boost levels from 10-25 PSI)

4.Small blue= 7.25 PSI

5.Large red= 10.15 PSI

6.Large yellow= 15.9 PSI 

This is a GN1Performance "Aluminum Gas Tank" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. Saves 5 lbs over the stock tank and eliminates the need to cut your trunk floor to install a fuel cell.  Not sold with any hardware and you must come up with your own straps to mount the tank. This all aluminum gas tank features a sump at the rear and a bung for a return line as well.  The tank has baffles inside to decrease fuel sloshing.  Designed for use with an external fuel pump and your stock fuel level sensor.  Can be used with an in tank pump with minor tweaking of the pump return.  You must also adapt a fuel filler tube to the tank. 

*FOR OFFROAD USE ONLY 

This is a GN1Performance "4 PIECE BILLET ALUMINUM PULLEY SET" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. These pulleys are CNC machined with a high polished finish. The kit includeds the crank pulley, water pump pulley, power steering pulley, and last but not least the alternator pulley. Not only do these pulleys look very nice, but they are also extremely light weight!

MADE IN U.S.A!

This is a GN1Performance "6 PIECE BILLET ALUMINUM PULLEY SET" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. These pulleys are CNC machined with a high polished finish. The kit includeds the crank pulley, water pump pulley, power steering pulley, tensioner pulley, alt fan, and last but not least the alternator pulley. Not only do these pulleys look very nice, but they are also extremely light weight!

MADE IN U.S.A!

This is a GN1Performance "ALUMINIM HIGH FLOW 3 ROW RADIATOR" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. This product not only looks great in the car, but also most importantly keeps your car running cool especially for those of you running front mount intercoolers. Not to mention this item will lighten up the front of your car. The radiator also has transmission and motor oil hook ups. The dimensions of this radiator are 31x18x2.5 and only weighs 13lbs!

This is a GN1Performance "ALUMINUM BATTERY BOX KIT" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. This is a all aluminum battery box, perfect for mounting in the trunk of your race car. Comes with everything in the pictures and cables also.

This is a "BILLET ALUMINUM THROTTLE BODY VACUUM BLOCK" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. This item replaces the stock cheap plastic piece. Our Vacuum block comes complete with 2 stud bolts, and a gasket. (Brass fitting not included). This item is made in the U.S.A. and has a billet machine finish to it.

This is a "Billet Aluminum Blow Off Valve". This comes with all of the hardware shown in the pictures. Includes a stainless steel and aluminum flange to work on any application.

*Intercooler pipe not included in this kit 

This is a pair of "COMETIC HEAD GASKETS" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. 

These gaskets come in .027, .040, and .060 thousandths, please specify which you would like upon purchasing. 

This is a Comp Turbo "CT-43 6765 TRIPLE BALL BEARING Series Billet Turbo" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. The CT-43 Turbo with CT 67 Billet compressor wheel and HE65 light weight 10 blade Turbine wheel. It has a 4" intake and a 3" outlet. This turbo is good for anywhere from 500-950HP. This turbo has a TRIPLE ball bearing configuration (the only Turbo on the market with this technology) and is also equipped with a .63 exhaust housing and a anti-surge compressor housing. This model also features a a high polished finish.

*This item is also available in .82 exhaust housing, please specify when ordering.

This is a Comp Turbo "CT-4 67-360 Series Billet Turbo" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. The CT-4 Turbo with CT 67 Billet compressor wheel and HE65 light weight 10 blade Turbine wheel. It has a 4" intake and a 2.5" outlet.   This turbo is good for anywhere from 500-750HP. This turbo has a standard 360 Journal bearing configuration and is also equipped with a .63 exhaust housing and a anti-surge compressor housing. 

*This item is also available in .82 exhaust housing, please specify when ordering.