I got a Prochamber too. I haven't installed it yet but mine only came with one gasket as well for the passenger side. However, I am going to purchase a new stock copper gasket as I heard those gaskets they supply with these aren't thew best.
my stainless prochamber fits fine, just leaks at the passenger manifold bc of that crappy gasket. I dont think a new stock gasket will help much, honestly. Im having Remflex make a custom gasket with more crush area. Great idea, since Im ordering longtubes in a few months (sarcasm). I just cant live with the leak anymore.
Remember, the studs on the factory manifolds have little shoulders on them. I pulled my factory studs out and replaced them with taurus manifold studs (no shoulder) and the pipe was able to mate up properly with the factory manifolds. It's a $10 fix.
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