I am running a 2.75 pulley with the JBA high flow catalytic converters. I switched to 1050IDs and had her remotely tuned. All seemed fine with no misses, etc. Then I noticed at idle the exhaust was not flowing well at all from the passenger side. This was coupled with misfiring when I would press the accelerator 20 percent down or more. The car would jerk and misfire. Just cruising, etc. was fine. No internal engine noise. It turned out that I dislodged the passenger side cat right into the X pipe. I bought the off road JBA pipe and had it installed. I thought this would cure everything. It cured the blockage. But now I still have that misfire on modest to hard acceleration. It idles fine. No internal engine noise. Sporadic P0300 code will pop up. But that is about it. I am bringing her to the mechanic next week. He said he is going to run a smoke test to see if a ring busted or if an exhaust valve burnt up. He thinks maybe the fuel backed up and I could of fouled out the stock iridium plugs. We have the brisk silvers going in at one step cooler. They are gapped at .028. I assume we should leave them there even though stock hellcats are gapped in the low 30s. Also it seems coincidental with the new 1050 injectors that this is happening. So this is a mystery to me. I know I backed up the engine with boost since the cat got lodged in the x pipe. So I could of hurt her?