5.7/6.1 hemi engine builders
I have been installing inertia parts for about 7 years now and have only had 2 issues, and both were corrected as fast as possible. Inertia is my go to shop for anything Hemi. We had one of my customers 4 door rams at the track tonight and got a 12.5@107 in a 2009 truck running inertia heads and cam. (and many other parts typical headers, cold air intake built trans, blower ect) but it was a custom ground blower cam, and the truck would not be nearly as powerful without it. Keep in mind we are talking about a 6000 pound truck here.
I hear Dave has great stuff as well. I would not hesitate to install his parts, I just have not personally installed any of his stuff.