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3 Bolt to 4 Bolt conversion
Product ID: ConversionTurboPlate

Details 

This is a GN1Performance "3 bolt to 4 bolt conversion plate" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. This item allows you to run a 3 bolt turbo with 4 bolt headers or vice versa.
Price: $65.00

Gasket SCE Header
Product ID: GasketSCEHeader

Details 

This is a set of SCE "HEADER GASKETS" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6Clean, flat surfaces are essential to a good seal. and the best way to seal a exhaust is with SCE Pro Copper embossed exhaust gaskets. These copper exhaust gaskets feature an embossed O-ring around the exhaust port to increase sealing pressure for a tight, leak-proof seal, even on imperfect surfaces. 
Price: $59.00

Header 2.5 Band Clamp
Product ID: HeaderBandClamp

Details 

This is  2.5" heavy duty Header Band Clamp. This clamp works on aftermarket headers only.

Price: $22.00

Header Clamps
Product ID: HeaderClamps

Details 

This is a pair of 2.25" heavy duty header clamps. These work on aftermarket headers only. Replace your old clamps with new ones as a good insurance for them not to break on you.

Price: $59.00

KB Stainless Steel Headers
Product ID: Headers

Details 

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 and are welded all the way around each tube!  These headers are only available in none polished raw stainless finish. They are complete with gaskets, clamps, and cross pipe.

*These are for competition use only modifications or adjustments maybe required. Header Application Down pipe is needed!

Would You Like to add SCE copper Header Gaskets? Yes (+$55.00)
No
Price: $599.00

KB4 4 Bolt Stainless Steel Headers
Product ID: Headers-KB4

Details 

This is a set of GN1Performance "KB-4 HEADERS" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6.The difference between these and the regular "KB Headers" is a 4 bolt flange rather than a 3 bolt. They feature HUGE ports and are welded all the way around each tube!  These headers are only available in none polished raw stainless finish. They are complete with gaskets, clamps, and cross pipe.
*These are for competition use only modifications or adjustments maybe required
 
Would You Like to add SCE copper Header Gaskets? Yes (+$55.00)
No
Price: $599.00

SE Headers
Product ID: Headers-SE

Details 

This is a set of GN1Performance "SE HEADERS" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6.They feature HUGE ports. These headers are only available in none polished raw stainless finish. They are complete with gaskets, clamps, and cross pipe.
 
 *These are for competition use only modifications or adjustments maybe required
Would You Like to add SCE copper Header Gaskets? Yes (+$55.00)
No
Price: $599.00



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