For anyone wondering about the Paxton kit - do it, you will NOT be disappointed. The install wasn't too bad, it took me a few weekends to complete but I finally finished it last weekend and had my car dyno'd today. In the 95 degree Texas heat it pulled 640.5 RWHP and 574.2 RWTQ. My only other mods are the Mopar cat-back exhaust, ATI harmonic damper, 3.45 gears plus I used the Roe Racing crank/harmonic damper pinning kit. I installed the 8:1 washer and ring spacer in the FMU because of the better flowing exhaust and the A/F ratio was in good shape, about 11:1 to 11.5:1 from 3500 to 6000 RPM. Not bad for a $6,500 bolt-on kit without having to touch any engine internals. A few pics of the install are below:
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