$375 to $495

All downpipes we sell are designed for use with aftermarket headers originally designed by ATR and Kenne-Bell.  Those headers have the crossover pipe from the driver's  side of the motor coming up into the motor compartment where it joins the passenger side pipes right before the turbo. The downpipe is designed to sweep farther out to clear this crossover.  Trimming of the plastic fenderwell is suggested as the downpipe will be real tight to this area.  These downpipes WILL work with the stock BUICK headers as well.

We are now selling 3.5" downpipes!  304 Stainless steel. There are three different versions available. Clears stock and aftermarket headers, minor trimming of inner fenderwell MAY be needed.  All three will fit with AC in place.

3.5" without ANY wastegate provisions, basically a pipe with a flat plate to bolt on to the turbo,  This is for installations that have the wastegate welded somewhere on the headers or crossover pipe OR if you want to fab up your own wastegate setup.

3.5" V-Band connection.  Same as above except it attaches to turbos that require a V-Band connection.

3.5" with 46mm EXTERNAL wastegate.

  Includes all hardware and gasket for the turbo.

NOTE!  We now have dump pipes to fit the 3.5" downpipes. Available separately below.
  There are no plans for just a test pipe.

CLICK ON PICS BELOW TO SEE FULL SIZE