Header Clamps 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. MSRP: Was: Now: $59.00 Add to Cart
Copper Header Gaskets This is a set of "COPPER HEADER GASKETS" for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. Clean, flat surfaces are essential to a good seal and the best way to seal a exhaust is with Copper exhaust gaskets. MSRP: Was: Now: $59.00 Add to Cart
Porting Exhaust Housing This is a picture to show how much your exhaust port should be ported when going with an aftermarket external down pipe. MSRP: Was: Now: $0.00
Exhaust Band Clamp This is a Stainless Steel Flat Exhaust Band Clamp. Available in 2.25" 3" and 4". Please choose from the options box the desired size. MSRP: Was: Now: $21.50 Choose Options
Boost Controller This is a Boost Controller which is good for up to 50psi. It comes complete with all the hardware, fittings, and mounting brackets necessary. *Please note, all manual boost controllers are to be used with EXTERNAL wastegates only. MSRP: Was: Now: $99.00 Add to Cart
4 INCH V BAND AND CLAMP This is a "V-BAND AND CLAMP COMBO" kit comes with a stainless steel v band ring and a heavy duty t clamp. This is a great item for those who would like to build their own custom down pipes. MSRP: Was: Now: $45.00 Add to Cart
3" Inch Exhaust Test Pipe 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 out of 304 Stainless Steel. This pipe is 13.25" in overall length. MSRP: Was: Now: $149.00 Choose Options
3" Inch Exhaust Cutout This is a GN1Performance 3" Exhaust Cut Out for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. This item is constructed out of 304 Stainless Steel. This pipe... MSRP: Was: Now: $169.00 Choose Options
3.5" Inch Exhaust Test Pipe This is a GN1Performance 3.5" 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 out of 304 Stainless Steel.This pipe is 13.25" in overall length. MSRP: Was: Now: $149.00 Choose Options
3.5" Inch Exhaust Cutout This is an all new GN1Performance 3.5" Exhaust Cut Out for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. This item is constructed out of 304 Stainless Steel.This pipe is 13.25" in overall length. MSRP: Was: Now: $169.00 Choose Options
