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This is a GN1Performance "3 INCH 46mm EXTERNAL WASTEGATE DOWN PIPE " for a 1986 or 1987 Buick Grand National, T Type, Turbo T, or GNX 3.8 liter turbo V6. This 3" Inch External Wastegate Down Pipe is constructed out of 304 stainless steel and comes with a V Band 46mm custom wastegate. All tig welds and is built to clear headers. Please keep in mind that when ordering any external wastegate down pipe a boost controller is need to allow it to function properly and avoid any damage.
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