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(586)294-4404
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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*
Freight is calculated for 1 to 2 boxes and will be quoted out after order is placed.
When your order has shipped, you will receive an email notification from ShipStation and Our Website which will include a tracking number you can use to check its status. Please allow 48 hours for the tracking information to become available as some methods of shipment differ from one to another.
If you haven’t received your order within 5 days of receiving your shipping confirmation email, please contact us at marianne@fullthrottlespeed.com with your name and order number, and we will look into it for you!