Just recieved my HPD pipe for my trailblazer today. I was reading over the instructions for the pipe and HPD recomends I use a good high temp sealant for the silencer and the manifold. Anybody done this? I am use to my stock machine that only has a flange to seal it . Any recomendations on a sealant.

 

GE hi-temp silicone , the red stuff , it is available at Walmart or any auto parts store .

 

I just went down to the local auto parts store and bought a tube of high temp automotive exhaust sealant. Blue Goo..... worked great, cost less than $2.