I also have the IPR GEN2 kit. It's much nicer than the sinister and the stainless steel up pipe is a better option than using a block-off plate. The IPR Extreme Duty HPOP screen is bomber as well.
Unless you've got magic fingers you'll need to take the turbo out so recondition that or upgrade. With the turbo out, it would also be a good time to make sure you've got the updated STC HOPO fitting. If your doing that then check the IPR screen (if the HPOP screen is compromised then debris can make it through the IPR screen leading to IPR valve failure (ie., a no-start condition). You'll probably break the fittings on the VGT turbo control solendoid harness so plan on replacing that as well. Hmmm, billet compressor wheel and updated turbo feed and drain lines. Good times:wings:.