This is a GN1Performance "3 INCH INTERNAL 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 Internal Wastegate Downpipe is designed to work with your factory turbo and factory wastegate actuator! This Product is constructed out of 304 stainless steel and is a ll tig welded, built to clear most headers (Our SE Headers).
Installation is simple, remove your original 2.5" Downpipe and remove the cast iron elbow on the exhaust side of the turbo. Leave the actuator on the turbo and bolt the new pipe on!
A new test pipe or cutout will be necessary to adapt the new Downpipe to your exhaust.
THESE PIPES ARE ENTIRELY MADE IN THE USA
Very Nice product. Robust Flange on the Turbo end of the pipe which was nice but required new bolts which were a bit of a pain to source. Nice quality and it fit well but one of the mounting bolt holes needed to be opened up. I'd recommend