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 Cottons Performance Center
 105 Walnut St.
 Agawam, MA 01001
 Ph:  (413) 789-0531
 Fx:  (413) 789-0401
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GN1 Intercooler "Extreme" Front Mount
Product ID: FMIC_E

Details 

This is a GN1Performance "EXTREME FRONT MOUNT INTERCOOLER" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. Its custom hand built aluminum front mount intercooler with the bar and plate core. This intercooler comes complete with all the aluminum pipes and hardware needed to put on your car today! The dimensions of this intercoolers core are 24x11x3, and from tank to tank is 30.5 inches in total length featuring 3" inlet and outlets. Tube sizes are all 3 inches in diameter and are mandrel bent aluminum pipes. This intercooler is light weight and good for up to 800hp. This intercooler has no turbo lag.
* Please specify when purchasing what size throttle body and what size your turbo outlet is so we can provide you with the correct hoses.
Price: $599.00

GN1 Intercooler "Super Extreme" Front Mount
Product ID: FMIC_SE

Details 

This is a GN1Performance "SUPER EXTREME FRONT MOUNT INTERCOOLER" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. This SUPER EXTREME model is a custom hand built aluminum front mount intercooler that has a bar and plate core .This intercooler comes complete with all the aluminum pipes and hardware needed to put on your car today! The dimensions of this intercoolers core are 27x17x3.5 Tube sizes are all 3 inches in diameter and are mandrel bent aluminum pipes.

* Please specify when purchasing what size throttle body and what size your turbo outlet is so we can provide you with the correct hoses.
Price: $699.00

Stroker Crank, 3.625 4340 Steel
Product ID: GN1-3.625

Details 

This is a GN1Performance "STEEL 3.625 STROKER CRANK " for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. This is a narrow journal width crank.

*In some cases, crank shafts may require minor machine work.

Price: $750.00

Aluminum Pulley Set
Product ID: GN1-APS4

Details 

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 includes 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!
Price: $339.00

Aluminum Pulley set
Product ID: GN1-APS6

Details 

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 includes 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!
Price: $399.00

Stock Stroke Crank, 3.400 4340 Steel
Product ID: GN1-C3.4

Details 

This is a GN1Performance "STOCK STROKE STEEL CRANK 3.400 " for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6.

*In some cases, crank shafts may require minor machine work.

Price: $750.00

Aluminum Stock Up Pipe Replacement
Product ID: GN1-SUP

Details 

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 great upgrade from the factory steel throttle body up pipe. It is polished 2.5" aluminum pipe and also comes with (2) 2.5 hoses and (4) heavy duty T-bolt clamps.

Price: $89.00


 
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Jack Cotton's 8.90 @ 154MPH 1986 Buick
 T-Type