Hey fellow Buick fans, I just ripped out the loud aftermarket exhaust on the Skylark and am almost done replacing with a stock Gardner exhaust kit. What I found was the heat riser on the passenger side was missing and it is making the otherwise perfect Gardner kit just short od fitting correctly. Does anyone know where I can get a delete part since I’m running an electric choke? Also, does this mean I need a gasket on the riser side and the driver (non riser) side between the exhaust pip and the exhaust manifold?